diff --git a/lib/PhpParser/Internal/PrintableNewAnonClassNode.php b/lib/PhpParser/Internal/PrintableNewAnonClassNode.php
index b30a99a14b..bce8faadb5 100644
--- a/lib/PhpParser/Internal/PrintableNewAnonClassNode.php
+++ b/lib/PhpParser/Internal/PrintableNewAnonClassNode.php
@@ -29,6 +29,8 @@ class PrintableNewAnonClassNode extends Expr {
     /** @var Node\Stmt[] Statements */
     public array $stmts;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'flags', 'args', 'extends', 'implements', 'stmts'];
+
     /**
      * @param Node\AttributeGroup[] $attrGroups PHP attribute groups
      * @param (Node\Arg|Node\VariadicPlaceholder)[] $args Arguments
@@ -65,7 +67,10 @@ public function getType(): string {
         return 'Expr_PrintableNewAnonClass';
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'flags', 'args', 'extends', 'implements', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 }
diff --git a/lib/PhpParser/Node/Arg.php b/lib/PhpParser/Node/Arg.php
index 6680efac98..5a20cf51fa 100644
--- a/lib/PhpParser/Node/Arg.php
+++ b/lib/PhpParser/Node/Arg.php
@@ -14,6 +14,8 @@ class Arg extends NodeAbstract {
     /** @var bool Whether to unpack the argument */
     public bool $unpack;
 
+    private const SUBNODE_NAMES = ['name', 'value', 'byRef', 'unpack'];
+
     /**
      * Constructs a function call argument node.
      *
@@ -34,8 +36,11 @@ public function __construct(
         $this->unpack = $unpack;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name', 'value', 'byRef', 'unpack'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/ArrayItem.php b/lib/PhpParser/Node/ArrayItem.php
index fa1cff5276..94dad9a040 100644
--- a/lib/PhpParser/Node/ArrayItem.php
+++ b/lib/PhpParser/Node/ArrayItem.php
@@ -14,6 +14,8 @@ class ArrayItem extends NodeAbstract {
     /** @var bool Whether to unpack the argument */
     public bool $unpack;
 
+    private const SUBNODE_NAMES = ['key', 'value', 'byRef', 'unpack'];
+
     /**
      * Constructs an array item node.
      *
@@ -30,8 +32,11 @@ public function __construct(Expr $value, ?Expr $key = null, bool $byRef = false,
         $this->unpack = $unpack;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['key', 'value', 'byRef', 'unpack'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Attribute.php b/lib/PhpParser/Node/Attribute.php
index 9d892436af..9d1004e000 100644
--- a/lib/PhpParser/Node/Attribute.php
+++ b/lib/PhpParser/Node/Attribute.php
@@ -12,6 +12,8 @@ class Attribute extends NodeAbstract {
     /** @var list<Arg> Attribute arguments */
     public array $args;
 
+    private const SUBNODE_NAMES = ['name', 'args'];
+
     /**
      * @param Node\Name $name Attribute name
      * @param list<Arg> $args Attribute arguments
@@ -23,8 +25,11 @@ public function __construct(Name $name, array $args = [], array $attributes = []
         $this->args = $args;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name', 'args'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/AttributeGroup.php b/lib/PhpParser/Node/AttributeGroup.php
index b9eb588d01..150efe2238 100644
--- a/lib/PhpParser/Node/AttributeGroup.php
+++ b/lib/PhpParser/Node/AttributeGroup.php
@@ -8,6 +8,8 @@ class AttributeGroup extends NodeAbstract {
     /** @var Attribute[] Attributes */
     public array $attrs;
 
+    private const SUBNODE_NAMES = ['attrs'];
+
     /**
      * @param Attribute[] $attrs PHP attributes
      * @param array<string, mixed> $attributes Additional node attributes
@@ -17,8 +19,11 @@ public function __construct(array $attrs, array $attributes = []) {
         $this->attrs = $attrs;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrs'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/ClosureUse.php b/lib/PhpParser/Node/ClosureUse.php
index e313280b6c..cb82cbdccb 100644
--- a/lib/PhpParser/Node/ClosureUse.php
+++ b/lib/PhpParser/Node/ClosureUse.php
@@ -10,6 +10,8 @@ class ClosureUse extends NodeAbstract {
     /** @var bool Whether to use by reference */
     public bool $byRef;
 
+    private const SUBNODE_NAMES = ['var', 'byRef'];
+
     /**
      * Constructs a closure use node.
      *
@@ -23,8 +25,11 @@ public function __construct(Expr\Variable $var, bool $byRef = false, array $attr
         $this->byRef = $byRef;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var', 'byRef'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Const_.php b/lib/PhpParser/Node/Const_.php
index 8b26ae86a4..2126973347 100644
--- a/lib/PhpParser/Node/Const_.php
+++ b/lib/PhpParser/Node/Const_.php
@@ -13,6 +13,8 @@ class Const_ extends NodeAbstract {
     /** @var Name|null Namespaced name (if using NameResolver) */
     public ?Name $namespacedName;
 
+    private const SUBNODE_NAMES = ['name', 'value'];
+
     /**
      * Constructs a const node for use in class const and const statements.
      *
@@ -26,8 +28,11 @@ public function __construct($name, Expr $value, array $attributes = []) {
         $this->value = $value;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name', 'value'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/DeclareItem.php b/lib/PhpParser/Node/DeclareItem.php
index 55c1fe4f19..28c5e2b9a9 100644
--- a/lib/PhpParser/Node/DeclareItem.php
+++ b/lib/PhpParser/Node/DeclareItem.php
@@ -11,6 +11,8 @@ class DeclareItem extends NodeAbstract {
     /** @var Node\Expr Value */
     public Expr $value;
 
+    private const SUBNODE_NAMES = ['key', 'value'];
+
     /**
      * Constructs a declare key=>value pair node.
      *
@@ -24,8 +26,11 @@ public function __construct($key, Node\Expr $value, array $attributes = []) {
         $this->value = $value;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['key', 'value'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/ArrayDimFetch.php b/lib/PhpParser/Node/Expr/ArrayDimFetch.php
index 24427bbc35..b2346c0478 100644
--- a/lib/PhpParser/Node/Expr/ArrayDimFetch.php
+++ b/lib/PhpParser/Node/Expr/ArrayDimFetch.php
@@ -10,6 +10,8 @@ class ArrayDimFetch extends Expr {
     /** @var null|Expr Array index / dim */
     public ?Expr $dim;
 
+    private const SUBNODE_NAMES = ['var', 'dim'];
+
     /**
      * Constructs an array index fetch node.
      *
@@ -23,8 +25,11 @@ public function __construct(Expr $var, ?Expr $dim = null, array $attributes = []
         $this->dim = $dim;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var', 'dim'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Array_.php b/lib/PhpParser/Node/Expr/Array_.php
index 3c8c9c2fcf..aadbe62907 100644
--- a/lib/PhpParser/Node/Expr/Array_.php
+++ b/lib/PhpParser/Node/Expr/Array_.php
@@ -13,6 +13,8 @@ class Array_ extends Expr {
     /** @var ArrayItem[] Items */
     public array $items;
 
+    private const SUBNODE_NAMES = ['items'];
+
     /**
      * Constructs an array node.
      *
@@ -24,8 +26,11 @@ public function __construct(array $items = [], array $attributes = []) {
         $this->items = $items;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['items'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/ArrowFunction.php b/lib/PhpParser/Node/Expr/ArrowFunction.php
index 0e98ce9f6b..65cabd7295 100644
--- a/lib/PhpParser/Node/Expr/ArrowFunction.php
+++ b/lib/PhpParser/Node/Expr/ArrowFunction.php
@@ -24,6 +24,8 @@ class ArrowFunction extends Expr implements FunctionLike {
     /** @var Node\AttributeGroup[] */
     public array $attrGroups;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'static', 'byRef', 'params', 'returnType', 'expr'];
+
     /**
      * @param array{
      *     expr: Expr,
@@ -51,8 +53,11 @@ public function __construct(array $subNodes, array $attributes = []) {
         $this->attrGroups = $subNodes['attrGroups'] ?? [];
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'static', 'byRef', 'params', 'returnType', 'expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function returnsByRef(): bool {
diff --git a/lib/PhpParser/Node/Expr/Assign.php b/lib/PhpParser/Node/Expr/Assign.php
index dcbf84dd41..2bd6652ef9 100644
--- a/lib/PhpParser/Node/Expr/Assign.php
+++ b/lib/PhpParser/Node/Expr/Assign.php
@@ -10,6 +10,8 @@ class Assign extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['var', 'expr'];
+
     /**
      * Constructs an assignment node.
      *
@@ -23,8 +25,11 @@ public function __construct(Expr $var, Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var', 'expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/AssignOp.php b/lib/PhpParser/Node/Expr/AssignOp.php
index 5209a64b1f..5ba9b0d614 100644
--- a/lib/PhpParser/Node/Expr/AssignOp.php
+++ b/lib/PhpParser/Node/Expr/AssignOp.php
@@ -10,6 +10,8 @@ abstract class AssignOp extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['var', 'expr'];
+
     /**
      * Constructs a compound assignment operation node.
      *
@@ -23,7 +25,10 @@ public function __construct(Expr $var, Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var', 'expr'];
+        return self::SUBNODE_NAMES;
     }
 }
diff --git a/lib/PhpParser/Node/Expr/AssignRef.php b/lib/PhpParser/Node/Expr/AssignRef.php
index 9714650a54..4ee8944e72 100644
--- a/lib/PhpParser/Node/Expr/AssignRef.php
+++ b/lib/PhpParser/Node/Expr/AssignRef.php
@@ -10,6 +10,8 @@ class AssignRef extends Expr {
     /** @var Expr Variable which is referenced */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['var', 'expr'];
+
     /**
      * Constructs an assignment node.
      *
@@ -23,8 +25,11 @@ public function __construct(Expr $var, Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var', 'expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/BinaryOp.php b/lib/PhpParser/Node/Expr/BinaryOp.php
index 1b92bd4f50..be17a0104b 100644
--- a/lib/PhpParser/Node/Expr/BinaryOp.php
+++ b/lib/PhpParser/Node/Expr/BinaryOp.php
@@ -10,6 +10,8 @@ abstract class BinaryOp extends Expr {
     /** @var Expr The right hand side expression */
     public Expr $right;
 
+    private const SUBNODE_NAMES = ['left', 'right'];
+
     /**
      * Constructs a binary operator node.
      *
@@ -23,8 +25,11 @@ public function __construct(Expr $left, Expr $right, array $attributes = []) {
         $this->right = $right;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['left', 'right'];
+        return self::SUBNODE_NAMES;
     }
 
     /**
diff --git a/lib/PhpParser/Node/Expr/BitwiseNot.php b/lib/PhpParser/Node/Expr/BitwiseNot.php
index b7175a7ae5..a1ceb60e55 100644
--- a/lib/PhpParser/Node/Expr/BitwiseNot.php
+++ b/lib/PhpParser/Node/Expr/BitwiseNot.php
@@ -8,6 +8,8 @@ class BitwiseNot extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs a bitwise not node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/BooleanNot.php b/lib/PhpParser/Node/Expr/BooleanNot.php
index c66d23326d..47850ae00b 100644
--- a/lib/PhpParser/Node/Expr/BooleanNot.php
+++ b/lib/PhpParser/Node/Expr/BooleanNot.php
@@ -8,6 +8,8 @@ class BooleanNot extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs a boolean not node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Cast.php b/lib/PhpParser/Node/Expr/Cast.php
index c2751de470..65c00c568c 100644
--- a/lib/PhpParser/Node/Expr/Cast.php
+++ b/lib/PhpParser/Node/Expr/Cast.php
@@ -8,6 +8,8 @@ abstract class Cast extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs a cast node.
      *
@@ -19,7 +21,10 @@ public function __construct(Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 }
diff --git a/lib/PhpParser/Node/Expr/ClassConstFetch.php b/lib/PhpParser/Node/Expr/ClassConstFetch.php
index 7fdd40e411..4d54c95673 100644
--- a/lib/PhpParser/Node/Expr/ClassConstFetch.php
+++ b/lib/PhpParser/Node/Expr/ClassConstFetch.php
@@ -13,6 +13,8 @@ class ClassConstFetch extends Expr {
     /** @var Identifier|Expr|Error Constant name */
     public Node $name;
 
+    private const SUBNODE_NAMES = ['class', 'name'];
+
     /**
      * Constructs a class const fetch node.
      *
@@ -26,8 +28,11 @@ public function __construct(Node $class, $name, array $attributes = []) {
         $this->name = \is_string($name) ? new Identifier($name) : $name;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['class', 'name'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Clone_.php b/lib/PhpParser/Node/Expr/Clone_.php
index d85bc9ab42..097b7d8954 100644
--- a/lib/PhpParser/Node/Expr/Clone_.php
+++ b/lib/PhpParser/Node/Expr/Clone_.php
@@ -8,6 +8,8 @@ class Clone_ extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs a clone node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Closure.php b/lib/PhpParser/Node/Expr/Closure.php
index 0680446f34..72625fbb7f 100644
--- a/lib/PhpParser/Node/Expr/Closure.php
+++ b/lib/PhpParser/Node/Expr/Closure.php
@@ -23,6 +23,8 @@ class Closure extends Expr implements FunctionLike {
     /** @var Node\AttributeGroup[] PHP attribute groups */
     public array $attrGroups;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'static', 'byRef', 'params', 'uses', 'returnType', 'stmts'];
+
     /**
      * Constructs a lambda function node.
      *
@@ -55,8 +57,11 @@ public function __construct(array $subNodes = [], array $attributes = []) {
         $this->attrGroups = $subNodes['attrGroups'] ?? [];
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'static', 'byRef', 'params', 'uses', 'returnType', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function returnsByRef(): bool {
diff --git a/lib/PhpParser/Node/Expr/ConstFetch.php b/lib/PhpParser/Node/Expr/ConstFetch.php
index 47191c5f33..ce4cbea1a3 100644
--- a/lib/PhpParser/Node/Expr/ConstFetch.php
+++ b/lib/PhpParser/Node/Expr/ConstFetch.php
@@ -9,6 +9,8 @@ class ConstFetch extends Expr {
     /** @var Name Constant name */
     public Name $name;
 
+    private const SUBNODE_NAMES = ['name'];
+
     /**
      * Constructs a const fetch node.
      *
@@ -20,8 +22,11 @@ public function __construct(Name $name, array $attributes = []) {
         $this->name = $name;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Empty_.php b/lib/PhpParser/Node/Expr/Empty_.php
index d2f30506ba..567ba90554 100644
--- a/lib/PhpParser/Node/Expr/Empty_.php
+++ b/lib/PhpParser/Node/Expr/Empty_.php
@@ -8,6 +8,8 @@ class Empty_ extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs an empty() node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/ErrorSuppress.php b/lib/PhpParser/Node/Expr/ErrorSuppress.php
index 32625a2335..b4c159df49 100644
--- a/lib/PhpParser/Node/Expr/ErrorSuppress.php
+++ b/lib/PhpParser/Node/Expr/ErrorSuppress.php
@@ -8,6 +8,8 @@ class ErrorSuppress extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs an error suppress node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Eval_.php b/lib/PhpParser/Node/Expr/Eval_.php
index 5120b1b4f3..82196d8f76 100644
--- a/lib/PhpParser/Node/Expr/Eval_.php
+++ b/lib/PhpParser/Node/Expr/Eval_.php
@@ -8,6 +8,8 @@ class Eval_ extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs an eval() node.
      *
@@ -19,10 +21,12 @@ public function __construct(Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Expr_Eval';
     }
diff --git a/lib/PhpParser/Node/Expr/Exit_.php b/lib/PhpParser/Node/Expr/Exit_.php
index cf00246699..ba43e2d8f7 100644
--- a/lib/PhpParser/Node/Expr/Exit_.php
+++ b/lib/PhpParser/Node/Expr/Exit_.php
@@ -12,6 +12,8 @@ class Exit_ extends Expr {
     /** @var null|Expr Expression */
     public ?Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs an exit() node.
      *
@@ -23,8 +25,11 @@ public function __construct(?Expr $expr = null, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/FuncCall.php b/lib/PhpParser/Node/Expr/FuncCall.php
index 0b85840d8e..aba4483a6d 100644
--- a/lib/PhpParser/Node/Expr/FuncCall.php
+++ b/lib/PhpParser/Node/Expr/FuncCall.php
@@ -11,6 +11,8 @@ class FuncCall extends CallLike {
     /** @var array<Node\Arg|Node\VariadicPlaceholder> Arguments */
     public array $args;
 
+    private const SUBNODE_NAMES = ['name', 'args'];
+
     /**
      * Constructs a function call node.
      *
@@ -24,8 +26,11 @@ public function __construct(Node $name, array $args = [], array $attributes = []
         $this->args = $args;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name', 'args'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Include_.php b/lib/PhpParser/Node/Expr/Include_.php
index e1187b194f..796ce88cd7 100644
--- a/lib/PhpParser/Node/Expr/Include_.php
+++ b/lib/PhpParser/Node/Expr/Include_.php
@@ -15,6 +15,8 @@ class Include_ extends Expr {
     /** @var int Type of include */
     public int $type;
 
+    private const SUBNODE_NAMES = ['expr', 'type'];
+
     /**
      * Constructs an include node.
      *
@@ -28,8 +30,11 @@ public function __construct(Expr $expr, int $type, array $attributes = []) {
         $this->type = $type;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr', 'type'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Instanceof_.php b/lib/PhpParser/Node/Expr/Instanceof_.php
index a2783cb3af..0a082b7b5c 100644
--- a/lib/PhpParser/Node/Expr/Instanceof_.php
+++ b/lib/PhpParser/Node/Expr/Instanceof_.php
@@ -12,6 +12,8 @@ class Instanceof_ extends Expr {
     /** @var Name|Expr Class name */
     public Node $class;
 
+    private const SUBNODE_NAMES = ['expr', 'class'];
+
     /**
      * Constructs an instanceof check node.
      *
@@ -25,8 +27,11 @@ public function __construct(Expr $expr, Node $class, array $attributes = []) {
         $this->class = $class;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr', 'class'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Isset_.php b/lib/PhpParser/Node/Expr/Isset_.php
index 4f80fff723..f82bce982c 100644
--- a/lib/PhpParser/Node/Expr/Isset_.php
+++ b/lib/PhpParser/Node/Expr/Isset_.php
@@ -8,6 +8,8 @@ class Isset_ extends Expr {
     /** @var Expr[] Variables */
     public array $vars;
 
+    private const SUBNODE_NAMES = ['vars'];
+
     /**
      * Constructs an array node.
      *
@@ -19,8 +21,11 @@ public function __construct(array $vars, array $attributes = []) {
         $this->vars = $vars;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['vars'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/List_.php b/lib/PhpParser/Node/Expr/List_.php
index 496b7b3853..bef3c86ea8 100644
--- a/lib/PhpParser/Node/Expr/List_.php
+++ b/lib/PhpParser/Node/Expr/List_.php
@@ -13,6 +13,8 @@ class List_ extends Expr {
     /** @var (ArrayItem|null)[] List of items to assign to */
     public array $items;
 
+    private const SUBNODE_NAMES = ['items'];
+
     /**
      * Constructs a list() destructuring node.
      *
@@ -24,8 +26,11 @@ public function __construct(array $items, array $attributes = []) {
         $this->items = $items;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['items'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Match_.php b/lib/PhpParser/Node/Expr/Match_.php
index cd028a2da7..085ac48383 100644
--- a/lib/PhpParser/Node/Expr/Match_.php
+++ b/lib/PhpParser/Node/Expr/Match_.php
@@ -11,6 +11,8 @@ class Match_ extends Node\Expr {
     /** @var MatchArm[] */
     public array $arms;
 
+    private const SUBNODE_NAMES = ['cond', 'arms'];
+
     /**
      * @param Node\Expr $cond Condition
      * @param MatchArm[] $arms
@@ -22,8 +24,11 @@ public function __construct(Node\Expr $cond, array $arms = [], array $attributes
         $this->arms = $arms;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['cond', 'arms'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/MethodCall.php b/lib/PhpParser/Node/Expr/MethodCall.php
index 2703c75d88..d12d2534aa 100644
--- a/lib/PhpParser/Node/Expr/MethodCall.php
+++ b/lib/PhpParser/Node/Expr/MethodCall.php
@@ -16,6 +16,8 @@ class MethodCall extends CallLike {
     /** @var array<Arg|VariadicPlaceholder> Arguments */
     public array $args;
 
+    private const SUBNODE_NAMES = ['var', 'name', 'args'];
+
     /**
      * Constructs a function call node.
      *
@@ -31,8 +33,11 @@ public function __construct(Expr $var, $name, array $args = [], array $attribute
         $this->args = $args;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var', 'name', 'args'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/New_.php b/lib/PhpParser/Node/Expr/New_.php
index eedaaa1e3b..6ac39afe1d 100644
--- a/lib/PhpParser/Node/Expr/New_.php
+++ b/lib/PhpParser/Node/Expr/New_.php
@@ -13,6 +13,8 @@ class New_ extends CallLike {
     /** @var array<Arg|VariadicPlaceholder> Arguments */
     public array $args;
 
+    private const SUBNODE_NAMES = ['class', 'args'];
+
     /**
      * Constructs a function call node.
      *
@@ -26,8 +28,11 @@ public function __construct(Node $class, array $args = [], array $attributes = [
         $this->args = $args;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['class', 'args'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/NullsafeMethodCall.php b/lib/PhpParser/Node/Expr/NullsafeMethodCall.php
index a151f71528..2ab5ad299f 100644
--- a/lib/PhpParser/Node/Expr/NullsafeMethodCall.php
+++ b/lib/PhpParser/Node/Expr/NullsafeMethodCall.php
@@ -16,6 +16,8 @@ class NullsafeMethodCall extends CallLike {
     /** @var array<Arg|VariadicPlaceholder> Arguments */
     public array $args;
 
+    private const SUBNODE_NAMES = ['var', 'name', 'args'];
+
     /**
      * Constructs a nullsafe method call node.
      *
@@ -31,8 +33,11 @@ public function __construct(Expr $var, $name, array $args = [], array $attribute
         $this->args = $args;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var', 'name', 'args'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/NullsafePropertyFetch.php b/lib/PhpParser/Node/Expr/NullsafePropertyFetch.php
index 6f73a16d76..ee3a72fae7 100644
--- a/lib/PhpParser/Node/Expr/NullsafePropertyFetch.php
+++ b/lib/PhpParser/Node/Expr/NullsafePropertyFetch.php
@@ -12,6 +12,8 @@ class NullsafePropertyFetch extends Expr {
     /** @var Identifier|Expr Property name */
     public Node $name;
 
+    private const SUBNODE_NAMES = ['var', 'name'];
+
     /**
      * Constructs a nullsafe property fetch node.
      *
@@ -25,8 +27,11 @@ public function __construct(Expr $var, $name, array $attributes = []) {
         $this->name = \is_string($name) ? new Identifier($name) : $name;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var', 'name'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/PostDec.php b/lib/PhpParser/Node/Expr/PostDec.php
index 3dca8fdc5a..b5d0784c89 100644
--- a/lib/PhpParser/Node/Expr/PostDec.php
+++ b/lib/PhpParser/Node/Expr/PostDec.php
@@ -8,6 +8,8 @@ class PostDec extends Expr {
     /** @var Expr Variable */
     public Expr $var;
 
+    private const SUBNODE_NAMES = ['var'];
+
     /**
      * Constructs a post decrement node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $var, array $attributes = []) {
         $this->var = $var;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/PostInc.php b/lib/PhpParser/Node/Expr/PostInc.php
index bc990c3030..421309385d 100644
--- a/lib/PhpParser/Node/Expr/PostInc.php
+++ b/lib/PhpParser/Node/Expr/PostInc.php
@@ -8,6 +8,8 @@ class PostInc extends Expr {
     /** @var Expr Variable */
     public Expr $var;
 
+    private const SUBNODE_NAMES = ['var'];
+
     /**
      * Constructs a post increment node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $var, array $attributes = []) {
         $this->var = $var;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/PreDec.php b/lib/PhpParser/Node/Expr/PreDec.php
index 2f16873016..18264afd70 100644
--- a/lib/PhpParser/Node/Expr/PreDec.php
+++ b/lib/PhpParser/Node/Expr/PreDec.php
@@ -8,6 +8,8 @@ class PreDec extends Expr {
     /** @var Expr Variable */
     public Expr $var;
 
+    private const SUBNODE_NAMES = ['var'];
+
     /**
      * Constructs a pre decrement node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $var, array $attributes = []) {
         $this->var = $var;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/PreInc.php b/lib/PhpParser/Node/Expr/PreInc.php
index fd455f55b9..63a4d78fd5 100644
--- a/lib/PhpParser/Node/Expr/PreInc.php
+++ b/lib/PhpParser/Node/Expr/PreInc.php
@@ -8,6 +8,8 @@ class PreInc extends Expr {
     /** @var Expr Variable */
     public Expr $var;
 
+    private const SUBNODE_NAMES = ['var'];
+
     /**
      * Constructs a pre increment node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $var, array $attributes = []) {
         $this->var = $var;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Print_.php b/lib/PhpParser/Node/Expr/Print_.php
index 605747604d..dc5628ab4f 100644
--- a/lib/PhpParser/Node/Expr/Print_.php
+++ b/lib/PhpParser/Node/Expr/Print_.php
@@ -8,6 +8,8 @@ class Print_ extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs an print() node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/PropertyFetch.php b/lib/PhpParser/Node/Expr/PropertyFetch.php
index 8c416a8c40..f96620294b 100644
--- a/lib/PhpParser/Node/Expr/PropertyFetch.php
+++ b/lib/PhpParser/Node/Expr/PropertyFetch.php
@@ -12,6 +12,8 @@ class PropertyFetch extends Expr {
     /** @var Identifier|Expr Property name */
     public Node $name;
 
+    private const SUBNODE_NAMES = ['var', 'name'];
+
     /**
      * Constructs a function call node.
      *
@@ -25,8 +27,11 @@ public function __construct(Expr $var, $name, array $attributes = []) {
         $this->name = \is_string($name) ? new Identifier($name) : $name;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var', 'name'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/ShellExec.php b/lib/PhpParser/Node/Expr/ShellExec.php
index e400351277..79bb457242 100644
--- a/lib/PhpParser/Node/Expr/ShellExec.php
+++ b/lib/PhpParser/Node/Expr/ShellExec.php
@@ -9,6 +9,8 @@ class ShellExec extends Expr {
     /** @var (Expr|InterpolatedStringPart)[] Interpolated string array */
     public array $parts;
 
+    private const SUBNODE_NAMES = ['parts'];
+
     /**
      * Constructs a shell exec (backtick) node.
      *
@@ -20,8 +22,11 @@ public function __construct(array $parts, array $attributes = []) {
         $this->parts = $parts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['parts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/StaticCall.php b/lib/PhpParser/Node/Expr/StaticCall.php
index 707f34b669..bd091d4c94 100644
--- a/lib/PhpParser/Node/Expr/StaticCall.php
+++ b/lib/PhpParser/Node/Expr/StaticCall.php
@@ -16,6 +16,8 @@ class StaticCall extends CallLike {
     /** @var array<Arg|VariadicPlaceholder> Arguments */
     public array $args;
 
+    private const SUBNODE_NAMES = ['class', 'name', 'args'];
+
     /**
      * Constructs a static method call node.
      *
@@ -31,8 +33,11 @@ public function __construct(Node $class, $name, array $args = [], array $attribu
         $this->args = $args;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['class', 'name', 'args'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/StaticPropertyFetch.php b/lib/PhpParser/Node/Expr/StaticPropertyFetch.php
index 4836a65b23..40212e5361 100644
--- a/lib/PhpParser/Node/Expr/StaticPropertyFetch.php
+++ b/lib/PhpParser/Node/Expr/StaticPropertyFetch.php
@@ -13,6 +13,8 @@ class StaticPropertyFetch extends Expr {
     /** @var VarLikeIdentifier|Expr Property name */
     public Node $name;
 
+    private const SUBNODE_NAMES = ['class', 'name'];
+
     /**
      * Constructs a static property fetch node.
      *
@@ -26,8 +28,11 @@ public function __construct(Node $class, $name, array $attributes = []) {
         $this->name = \is_string($name) ? new VarLikeIdentifier($name) : $name;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['class', 'name'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Ternary.php b/lib/PhpParser/Node/Expr/Ternary.php
index d4837e6402..b1c3265659 100644
--- a/lib/PhpParser/Node/Expr/Ternary.php
+++ b/lib/PhpParser/Node/Expr/Ternary.php
@@ -12,6 +12,8 @@ class Ternary extends Expr {
     /** @var Expr Expression for false */
     public Expr $else;
 
+    private const SUBNODE_NAMES = ['cond', 'if', 'else'];
+
     /**
      * Constructs a ternary operator node.
      *
@@ -27,8 +29,11 @@ public function __construct(Expr $cond, ?Expr $if, Expr $else, array $attributes
         $this->else = $else;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['cond', 'if', 'else'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Throw_.php b/lib/PhpParser/Node/Expr/Throw_.php
index ee49f835fb..3254b2c3f0 100644
--- a/lib/PhpParser/Node/Expr/Throw_.php
+++ b/lib/PhpParser/Node/Expr/Throw_.php
@@ -8,6 +8,8 @@ class Throw_ extends Node\Expr {
     /** @var Node\Expr Expression */
     public Node\Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs a throw expression node.
      *
@@ -19,8 +21,11 @@ public function __construct(Node\Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/UnaryMinus.php b/lib/PhpParser/Node/Expr/UnaryMinus.php
index cd06f74bab..af7cefb3e0 100644
--- a/lib/PhpParser/Node/Expr/UnaryMinus.php
+++ b/lib/PhpParser/Node/Expr/UnaryMinus.php
@@ -8,6 +8,8 @@ class UnaryMinus extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs a unary minus node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/UnaryPlus.php b/lib/PhpParser/Node/Expr/UnaryPlus.php
index 1b44f7b3e7..5a5e48f666 100644
--- a/lib/PhpParser/Node/Expr/UnaryPlus.php
+++ b/lib/PhpParser/Node/Expr/UnaryPlus.php
@@ -8,6 +8,8 @@ class UnaryPlus extends Expr {
     /** @var Expr Expression */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs a unary plus node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Variable.php b/lib/PhpParser/Node/Expr/Variable.php
index bab74920a1..db91a86893 100644
--- a/lib/PhpParser/Node/Expr/Variable.php
+++ b/lib/PhpParser/Node/Expr/Variable.php
@@ -8,6 +8,8 @@ class Variable extends Expr {
     /** @var string|Expr Name */
     public $name;
 
+    private const SUBNODE_NAMES = ['name'];
+
     /**
      * Constructs a variable node.
      *
@@ -19,8 +21,11 @@ public function __construct($name, array $attributes = []) {
         $this->name = $name;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/YieldFrom.php b/lib/PhpParser/Node/Expr/YieldFrom.php
index 5cff88f869..5a7942b2db 100644
--- a/lib/PhpParser/Node/Expr/YieldFrom.php
+++ b/lib/PhpParser/Node/Expr/YieldFrom.php
@@ -8,6 +8,8 @@ class YieldFrom extends Expr {
     /** @var Expr Expression to yield from */
     public Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs an "yield from" node.
      *
@@ -19,8 +21,11 @@ public function __construct(Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Expr/Yield_.php b/lib/PhpParser/Node/Expr/Yield_.php
index bd81e69b31..ea706a4d24 100644
--- a/lib/PhpParser/Node/Expr/Yield_.php
+++ b/lib/PhpParser/Node/Expr/Yield_.php
@@ -10,6 +10,8 @@ class Yield_ extends Expr {
     /** @var null|Expr Value expression */
     public ?Expr $value;
 
+    private const SUBNODE_NAMES = ['key', 'value'];
+
     /**
      * Constructs a yield expression node.
      *
@@ -23,8 +25,11 @@ public function __construct(?Expr $value = null, ?Expr $key = null, array $attri
         $this->value = $value;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['key', 'value'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Identifier.php b/lib/PhpParser/Node/Identifier.php
index 01eebe5ca4..0e42f518af 100644
--- a/lib/PhpParser/Node/Identifier.php
+++ b/lib/PhpParser/Node/Identifier.php
@@ -21,6 +21,8 @@ class Identifier extends NodeAbstract {
         'static' => true,
     ];
 
+    private const SUBNODE_NAMES = ['name'];
+
     /**
      * Constructs an identifier node.
      *
@@ -36,8 +38,11 @@ public function __construct(string $name, array $attributes = []) {
         $this->name = $name;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name'];
+        return self::SUBNODE_NAMES;
     }
 
     /**
diff --git a/lib/PhpParser/Node/InterpolatedStringPart.php b/lib/PhpParser/Node/InterpolatedStringPart.php
index 576dac46f5..5c1a8e17a1 100644
--- a/lib/PhpParser/Node/InterpolatedStringPart.php
+++ b/lib/PhpParser/Node/InterpolatedStringPart.php
@@ -8,6 +8,8 @@ class InterpolatedStringPart extends NodeAbstract {
     /** @var string String value */
     public string $value;
 
+    private const SUBNODE_NAMES = ['value'];
+
     /**
      * Constructs a node representing a string part of an interpolated string.
      *
@@ -19,8 +21,11 @@ public function __construct(string $value, array $attributes = []) {
         $this->value = $value;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['value'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/IntersectionType.php b/lib/PhpParser/Node/IntersectionType.php
index 3b39cf105b..d649545f57 100644
--- a/lib/PhpParser/Node/IntersectionType.php
+++ b/lib/PhpParser/Node/IntersectionType.php
@@ -6,6 +6,8 @@ class IntersectionType extends ComplexType {
     /** @var (Identifier|Name)[] Types */
     public array $types;
 
+    private const SUBNODE_NAMES = ['types'];
+
     /**
      * Constructs an intersection type.
      *
@@ -17,8 +19,11 @@ public function __construct(array $types, array $attributes = []) {
         $this->types = $types;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['types'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/MatchArm.php b/lib/PhpParser/Node/MatchArm.php
index 2927f029d6..d24e4d1d29 100644
--- a/lib/PhpParser/Node/MatchArm.php
+++ b/lib/PhpParser/Node/MatchArm.php
@@ -11,6 +11,8 @@ class MatchArm extends NodeAbstract {
     /** @var Node\Expr */
     public Expr $body;
 
+    private const SUBNODE_NAMES = ['conds', 'body'];
+
     /**
      * @param null|list<Node\Expr> $conds
      */
@@ -20,8 +22,11 @@ public function __construct(?array $conds, Node\Expr $body, array $attributes =
         $this->attributes = $attributes;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['conds', 'body'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Name.php b/lib/PhpParser/Node/Name.php
index aa2b90eb22..78be134c49 100644
--- a/lib/PhpParser/Node/Name.php
+++ b/lib/PhpParser/Node/Name.php
@@ -18,6 +18,8 @@ class Name extends NodeAbstract {
         'static' => true,
     ];
 
+    private const SUBNODE_NAMES = ['name'];
+
     /**
      * Constructs a name node.
      *
@@ -29,8 +31,11 @@ final public function __construct($name, array $attributes = []) {
         $this->name = self::prepareName($name);
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name'];
+        return self::SUBNODE_NAMES;
     }
 
     /**
diff --git a/lib/PhpParser/Node/NullableType.php b/lib/PhpParser/Node/NullableType.php
index b99acd1351..e284a7ae21 100644
--- a/lib/PhpParser/Node/NullableType.php
+++ b/lib/PhpParser/Node/NullableType.php
@@ -8,6 +8,8 @@ class NullableType extends ComplexType {
     /** @var Identifier|Name Type */
     public Node $type;
 
+    private const SUBNODE_NAMES = ['type'];
+
     /**
      * Constructs a nullable type (wrapping another type).
      *
@@ -19,8 +21,11 @@ public function __construct(Node $type, array $attributes = []) {
         $this->type = $type;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['type'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Param.php b/lib/PhpParser/Node/Param.php
index a277ca0a15..b0c4cf91bc 100644
--- a/lib/PhpParser/Node/Param.php
+++ b/lib/PhpParser/Node/Param.php
@@ -24,6 +24,8 @@ class Param extends NodeAbstract {
     /** @var PropertyHook[] Property hooks for promoted properties */
     public array $hooks;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'flags', 'type', 'byRef', 'variadic', 'var', 'default', 'hooks'];
+
     /**
      * Constructs a parameter node.
      *
@@ -56,8 +58,11 @@ public function __construct(
         $this->hooks = $hooks;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'flags', 'type', 'byRef', 'variadic', 'var', 'default', 'hooks'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/PropertyHook.php b/lib/PhpParser/Node/PropertyHook.php
index a8cde850f7..9b662d20a4 100644
--- a/lib/PhpParser/Node/PropertyHook.php
+++ b/lib/PhpParser/Node/PropertyHook.php
@@ -19,6 +19,8 @@ class PropertyHook extends NodeAbstract implements FunctionLike {
     /** @var null|Expr|Stmt[] Hook body */
     public $body;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'flags', 'byRef', 'name', 'params', 'body'];
+
     /**
      * Constructs a property hook node.
      *
@@ -72,7 +74,10 @@ public function getType(): string {
         return 'PropertyHook';
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'flags', 'byRef', 'name', 'params', 'body'];
+        return self::SUBNODE_NAMES;
     }
 }
diff --git a/lib/PhpParser/Node/PropertyItem.php b/lib/PhpParser/Node/PropertyItem.php
index 101611e6bc..2e7898053e 100644
--- a/lib/PhpParser/Node/PropertyItem.php
+++ b/lib/PhpParser/Node/PropertyItem.php
@@ -11,6 +11,8 @@ class PropertyItem extends NodeAbstract {
     /** @var null|Node\Expr Default */
     public ?Expr $default;
 
+    private const SUBNODE_NAMES = ['name', 'default'];
+
     /**
      * Constructs a class property item node.
      *
@@ -24,8 +26,11 @@ public function __construct($name, ?Node\Expr $default = null, array $attributes
         $this->default = $default;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name', 'default'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Scalar/Float_.php b/lib/PhpParser/Node/Scalar/Float_.php
index 5af1319237..47e71c772a 100644
--- a/lib/PhpParser/Node/Scalar/Float_.php
+++ b/lib/PhpParser/Node/Scalar/Float_.php
@@ -8,6 +8,8 @@ class Float_ extends Scalar {
     /** @var float Number value */
     public float $value;
 
+    private const SUBNODE_NAMES = ['value'];
+
     /**
      * Constructs a float number scalar node.
      *
@@ -19,8 +21,11 @@ public function __construct(float $value, array $attributes = []) {
         $this->value = $value;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['value'];
+        return self::SUBNODE_NAMES;
     }
 
     /**
diff --git a/lib/PhpParser/Node/Scalar/Int_.php b/lib/PhpParser/Node/Scalar/Int_.php
index bcc257a6a1..6a34277d54 100644
--- a/lib/PhpParser/Node/Scalar/Int_.php
+++ b/lib/PhpParser/Node/Scalar/Int_.php
@@ -15,6 +15,8 @@ class Int_ extends Scalar {
     /** @var int Number value */
     public int $value;
 
+    private const SUBNODE_NAMES = ['value'];
+
     /**
      * Constructs an integer number scalar node.
      *
@@ -26,8 +28,11 @@ public function __construct(int $value, array $attributes = []) {
         $this->value = $value;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['value'];
+        return self::SUBNODE_NAMES;
     }
 
     /**
diff --git a/lib/PhpParser/Node/Scalar/InterpolatedString.php b/lib/PhpParser/Node/Scalar/InterpolatedString.php
index 9336dfe4da..ce3826af87 100644
--- a/lib/PhpParser/Node/Scalar/InterpolatedString.php
+++ b/lib/PhpParser/Node/Scalar/InterpolatedString.php
@@ -10,6 +10,8 @@ class InterpolatedString extends Scalar {
     /** @var (Expr|InterpolatedStringPart)[] list of string parts */
     public array $parts;
 
+    private const SUBNODE_NAMES = ['parts'];
+
     /**
      * Constructs an interpolated string node.
      *
@@ -21,8 +23,11 @@ public function __construct(array $parts, array $attributes = []) {
         $this->parts = $parts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['parts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Scalar/String_.php b/lib/PhpParser/Node/Scalar/String_.php
index c965366d43..835313a2d1 100644
--- a/lib/PhpParser/Node/Scalar/String_.php
+++ b/lib/PhpParser/Node/Scalar/String_.php
@@ -27,6 +27,8 @@ class String_ extends Scalar {
         'e'  => "\x1B",
     ];
 
+    private const SUBNODE_NAMES = ['value'];
+
     /**
      * Constructs a string scalar node.
      *
@@ -38,8 +40,11 @@ public function __construct(string $value, array $attributes = []) {
         $this->value = $value;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['value'];
+        return self::SUBNODE_NAMES;
     }
 
     /**
diff --git a/lib/PhpParser/Node/StaticVar.php b/lib/PhpParser/Node/StaticVar.php
index 517c0edddd..03c05d6f74 100644
--- a/lib/PhpParser/Node/StaticVar.php
+++ b/lib/PhpParser/Node/StaticVar.php
@@ -11,6 +11,8 @@ class StaticVar extends NodeAbstract {
     /** @var null|Node\Expr Default value */
     public ?Expr $default;
 
+    private const SUBNODE_NAMES = ['var', 'default'];
+
     /**
      * Constructs a static variable node.
      *
@@ -26,8 +28,11 @@ public function __construct(
         $this->default = $default;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['var', 'default'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Block.php b/lib/PhpParser/Node/Stmt/Block.php
index 073df2086f..2dfb958650 100644
--- a/lib/PhpParser/Node/Stmt/Block.php
+++ b/lib/PhpParser/Node/Stmt/Block.php
@@ -8,6 +8,8 @@ class Block extends Stmt {
     /** @var Stmt[] Statements */
     public array $stmts;
 
+    private const SUBNODE_NAMES = ['stmts'];
+
     /**
      * A block of statements.
      *
@@ -23,7 +25,10 @@ public function getType(): string {
         return 'Stmt_Block';
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['stmts'];
+        return self::SUBNODE_NAMES;
     }
 }
diff --git a/lib/PhpParser/Node/Stmt/Break_.php b/lib/PhpParser/Node/Stmt/Break_.php
index d2bcc5eb2d..96a28d2560 100644
--- a/lib/PhpParser/Node/Stmt/Break_.php
+++ b/lib/PhpParser/Node/Stmt/Break_.php
@@ -8,6 +8,8 @@ class Break_ extends Node\Stmt {
     /** @var null|Node\Expr Number of loops to break */
     public ?Node\Expr $num;
 
+    private const SUBNODE_NAMES = ['num'];
+
     /**
      * Constructs a break node.
      *
@@ -19,8 +21,11 @@ public function __construct(?Node\Expr $num = null, array $attributes = []) {
         $this->num = $num;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['num'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Case_.php b/lib/PhpParser/Node/Stmt/Case_.php
index a06ca1832e..108ee9e799 100644
--- a/lib/PhpParser/Node/Stmt/Case_.php
+++ b/lib/PhpParser/Node/Stmt/Case_.php
@@ -10,6 +10,8 @@ class Case_ extends Node\Stmt {
     /** @var Node\Stmt[] Statements */
     public array $stmts;
 
+    private const SUBNODE_NAMES = ['cond', 'stmts'];
+
     /**
      * Constructs a case node.
      *
@@ -23,8 +25,11 @@ public function __construct(?Node\Expr $cond, array $stmts = [], array $attribut
         $this->stmts = $stmts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['cond', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Catch_.php b/lib/PhpParser/Node/Stmt/Catch_.php
index e8d39c9cce..38fa6e2ac5 100644
--- a/lib/PhpParser/Node/Stmt/Catch_.php
+++ b/lib/PhpParser/Node/Stmt/Catch_.php
@@ -13,6 +13,8 @@ class Catch_ extends Node\Stmt {
     /** @var Node\Stmt[] Statements */
     public array $stmts;
 
+    private const SUBNODE_NAMES = ['types', 'var', 'stmts'];
+
     /**
      * Constructs a catch node.
      *
@@ -30,8 +32,11 @@ public function __construct(
         $this->stmts = $stmts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['types', 'var', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/ClassConst.php b/lib/PhpParser/Node/Stmt/ClassConst.php
index 9bdce1f1db..ba013a99dd 100644
--- a/lib/PhpParser/Node/Stmt/ClassConst.php
+++ b/lib/PhpParser/Node/Stmt/ClassConst.php
@@ -15,6 +15,8 @@ class ClassConst extends Node\Stmt {
     /** @var Node\Identifier|Node\Name|Node\ComplexType|null Type declaration */
     public ?Node $type;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'flags', 'type', 'consts'];
+
     /**
      * Constructs a class const list node.
      *
@@ -38,8 +40,11 @@ public function __construct(
         $this->type = $type;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'flags', 'type', 'consts'];
+        return self::SUBNODE_NAMES;
     }
 
     /**
diff --git a/lib/PhpParser/Node/Stmt/ClassMethod.php b/lib/PhpParser/Node/Stmt/ClassMethod.php
index 59c0519ea6..aeb2269d33 100644
--- a/lib/PhpParser/Node/Stmt/ClassMethod.php
+++ b/lib/PhpParser/Node/Stmt/ClassMethod.php
@@ -43,6 +43,8 @@ class ClassMethod extends Node\Stmt implements FunctionLike {
         '__unserialize' => true,
     ];
 
+    private const SUBNODE_NAMES = ['attrGroups', 'flags', 'byRef', 'name', 'params', 'returnType', 'stmts'];
+
     /**
      * Constructs a class method node.
      *
@@ -74,8 +76,11 @@ public function __construct($name, array $subNodes = [], array $attributes = [])
         $this->attrGroups = $subNodes['attrGroups'] ?? [];
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'flags', 'byRef', 'name', 'params', 'returnType', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function returnsByRef(): bool {
diff --git a/lib/PhpParser/Node/Stmt/Class_.php b/lib/PhpParser/Node/Stmt/Class_.php
index 3f492b7bb3..2c11750bf4 100644
--- a/lib/PhpParser/Node/Stmt/Class_.php
+++ b/lib/PhpParser/Node/Stmt/Class_.php
@@ -31,6 +31,8 @@ class Class_ extends ClassLike {
     /** @var Node\Name[] Names of implemented interfaces */
     public array $implements;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'flags', 'name', 'extends', 'implements', 'stmts'];
+
     /**
      * Constructs a class node.
      *
@@ -59,8 +61,11 @@ public function __construct($name, array $subNodes = [], array $attributes = [])
         $this->attrGroups = $subNodes['attrGroups'] ?? [];
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'flags', 'name', 'extends', 'implements', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     /**
diff --git a/lib/PhpParser/Node/Stmt/Const_.php b/lib/PhpParser/Node/Stmt/Const_.php
index f1165fd0b0..39e4867712 100644
--- a/lib/PhpParser/Node/Stmt/Const_.php
+++ b/lib/PhpParser/Node/Stmt/Const_.php
@@ -8,6 +8,8 @@ class Const_ extends Node\Stmt {
     /** @var Node\Const_[] Constant declarations */
     public array $consts;
 
+    private const SUBNODE_NAMES = ['consts'];
+
     /**
      * Constructs a const list node.
      *
@@ -19,8 +21,11 @@ public function __construct(array $consts, array $attributes = []) {
         $this->consts = $consts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['consts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Continue_.php b/lib/PhpParser/Node/Stmt/Continue_.php
index 54e979ddaa..0dcc11958b 100644
--- a/lib/PhpParser/Node/Stmt/Continue_.php
+++ b/lib/PhpParser/Node/Stmt/Continue_.php
@@ -8,6 +8,8 @@ class Continue_ extends Node\Stmt {
     /** @var null|Node\Expr Number of loops to continue */
     public ?Node\Expr $num;
 
+    private const SUBNODE_NAMES = ['num'];
+
     /**
      * Constructs a continue node.
      *
@@ -19,8 +21,11 @@ public function __construct(?Node\Expr $num = null, array $attributes = []) {
         $this->num = $num;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['num'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Declare_.php b/lib/PhpParser/Node/Stmt/Declare_.php
index 3c0547bdf2..380f5ebaf9 100644
--- a/lib/PhpParser/Node/Stmt/Declare_.php
+++ b/lib/PhpParser/Node/Stmt/Declare_.php
@@ -11,6 +11,8 @@ class Declare_ extends Node\Stmt {
     /** @var Node\Stmt[]|null Statements */
     public ?array $stmts;
 
+    private const SUBNODE_NAMES = ['declares', 'stmts'];
+
     /**
      * Constructs a declare node.
      *
@@ -24,8 +26,11 @@ public function __construct(array $declares, ?array $stmts = null, array $attrib
         $this->stmts = $stmts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['declares', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Do_.php b/lib/PhpParser/Node/Stmt/Do_.php
index 6124442881..b83bb01e17 100644
--- a/lib/PhpParser/Node/Stmt/Do_.php
+++ b/lib/PhpParser/Node/Stmt/Do_.php
@@ -10,6 +10,8 @@ class Do_ extends Node\Stmt {
     /** @var Node\Expr Condition */
     public Node\Expr $cond;
 
+    private const SUBNODE_NAMES = ['stmts', 'cond'];
+
     /**
      * Constructs a do while node.
      *
@@ -23,8 +25,11 @@ public function __construct(Node\Expr $cond, array $stmts = [], array $attribute
         $this->stmts = $stmts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['stmts', 'cond'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Echo_.php b/lib/PhpParser/Node/Stmt/Echo_.php
index 4d42452353..95f2ee83a2 100644
--- a/lib/PhpParser/Node/Stmt/Echo_.php
+++ b/lib/PhpParser/Node/Stmt/Echo_.php
@@ -8,6 +8,8 @@ class Echo_ extends Node\Stmt {
     /** @var Node\Expr[] Expressions */
     public array $exprs;
 
+    private const SUBNODE_NAMES = ['exprs'];
+
     /**
      * Constructs an echo node.
      *
@@ -19,8 +21,11 @@ public function __construct(array $exprs, array $attributes = []) {
         $this->exprs = $exprs;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['exprs'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/ElseIf_.php b/lib/PhpParser/Node/Stmt/ElseIf_.php
index b26d59ce5f..30318cd74e 100644
--- a/lib/PhpParser/Node/Stmt/ElseIf_.php
+++ b/lib/PhpParser/Node/Stmt/ElseIf_.php
@@ -10,6 +10,8 @@ class ElseIf_ extends Node\Stmt {
     /** @var Node\Stmt[] Statements */
     public array $stmts;
 
+    private const SUBNODE_NAMES = ['cond', 'stmts'];
+
     /**
      * Constructs an elseif node.
      *
@@ -23,8 +25,11 @@ public function __construct(Node\Expr $cond, array $stmts = [], array $attribute
         $this->stmts = $stmts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['cond', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Else_.php b/lib/PhpParser/Node/Stmt/Else_.php
index 3d2b066ec9..34127321b4 100644
--- a/lib/PhpParser/Node/Stmt/Else_.php
+++ b/lib/PhpParser/Node/Stmt/Else_.php
@@ -8,6 +8,8 @@ class Else_ extends Node\Stmt {
     /** @var Node\Stmt[] Statements */
     public array $stmts;
 
+    private const SUBNODE_NAMES = ['stmts'];
+
     /**
      * Constructs an else node.
      *
@@ -19,8 +21,11 @@ public function __construct(array $stmts = [], array $attributes = []) {
         $this->stmts = $stmts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/EnumCase.php b/lib/PhpParser/Node/Stmt/EnumCase.php
index c071a0af13..c86ffa99d7 100644
--- a/lib/PhpParser/Node/Stmt/EnumCase.php
+++ b/lib/PhpParser/Node/Stmt/EnumCase.php
@@ -13,6 +13,8 @@ class EnumCase extends Node\Stmt {
     /** @var Node\AttributeGroup[] PHP attribute groups */
     public array $attrGroups;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'name', 'expr'];
+
     /**
      * @param string|Node\Identifier $name Enum case name
      * @param Node\Expr|null $expr Enum case expression
@@ -26,8 +28,11 @@ public function __construct($name, ?Node\Expr $expr = null, array $attrGroups =
         $this->attrGroups = $attrGroups;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'name', 'expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Enum_.php b/lib/PhpParser/Node/Stmt/Enum_.php
index 7eea6a6991..5d2eac118e 100644
--- a/lib/PhpParser/Node/Stmt/Enum_.php
+++ b/lib/PhpParser/Node/Stmt/Enum_.php
@@ -10,6 +10,8 @@ class Enum_ extends ClassLike {
     /** @var Node\Name[] Names of implemented interfaces */
     public array $implements;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'name', 'scalarType', 'implements', 'stmts'];
+
     /**
      * @param string|Node\Identifier|null $name Name
      * @param array{
@@ -34,8 +36,11 @@ public function __construct($name, array $subNodes = [], array $attributes = [])
         parent::__construct($attributes);
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'name', 'scalarType', 'implements', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Expression.php b/lib/PhpParser/Node/Stmt/Expression.php
index 89751fa2dc..3f910a1c88 100644
--- a/lib/PhpParser/Node/Stmt/Expression.php
+++ b/lib/PhpParser/Node/Stmt/Expression.php
@@ -11,6 +11,8 @@ class Expression extends Node\Stmt {
     /** @var Node\Expr Expression */
     public Node\Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs an expression statement.
      *
@@ -22,8 +24,11 @@ public function __construct(Node\Expr $expr, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Finally_.php b/lib/PhpParser/Node/Stmt/Finally_.php
index 69ecf25373..c8bf379d68 100644
--- a/lib/PhpParser/Node/Stmt/Finally_.php
+++ b/lib/PhpParser/Node/Stmt/Finally_.php
@@ -8,6 +8,8 @@ class Finally_ extends Node\Stmt {
     /** @var Node\Stmt[] Statements */
     public array $stmts;
 
+    private const SUBNODE_NAMES = ['stmts'];
+
     /**
      * Constructs a finally node.
      *
@@ -19,8 +21,11 @@ public function __construct(array $stmts = [], array $attributes = []) {
         $this->stmts = $stmts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/For_.php b/lib/PhpParser/Node/Stmt/For_.php
index 6f2fbb9e3a..d30a69fa37 100644
--- a/lib/PhpParser/Node/Stmt/For_.php
+++ b/lib/PhpParser/Node/Stmt/For_.php
@@ -14,6 +14,8 @@ class For_ extends Node\Stmt {
     /** @var Node\Stmt[] Statements */
     public array $stmts;
 
+    private const SUBNODE_NAMES = ['init', 'cond', 'loop', 'stmts'];
+
     /**
      * Constructs a for loop node.
      *
@@ -37,8 +39,11 @@ public function __construct(array $subNodes = [], array $attributes = []) {
         $this->stmts = $subNodes['stmts'] ?? [];
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['init', 'cond', 'loop', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Foreach_.php b/lib/PhpParser/Node/Stmt/Foreach_.php
index c5d9a8b132..2892cdf53a 100644
--- a/lib/PhpParser/Node/Stmt/Foreach_.php
+++ b/lib/PhpParser/Node/Stmt/Foreach_.php
@@ -16,6 +16,8 @@ class Foreach_ extends Node\Stmt {
     /** @var Node\Stmt[] Statements */
     public array $stmts;
 
+    private const SUBNODE_NAMES = ['expr', 'keyVar', 'byRef', 'valueVar', 'stmts'];
+
     /**
      * Constructs a foreach node.
      *
@@ -40,8 +42,11 @@ public function __construct(Node\Expr $expr, Node\Expr $valueVar, array $subNode
         $this->stmts = $subNodes['stmts'] ?? [];
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr', 'keyVar', 'byRef', 'valueVar', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Function_.php b/lib/PhpParser/Node/Stmt/Function_.php
index 2111bab749..feb1c110e7 100644
--- a/lib/PhpParser/Node/Stmt/Function_.php
+++ b/lib/PhpParser/Node/Stmt/Function_.php
@@ -22,6 +22,8 @@ class Function_ extends Node\Stmt implements FunctionLike {
     /** @var Node\Name|null Namespaced name (if using NameResolver) */
     public ?Node\Name $namespacedName;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'byRef', 'name', 'params', 'returnType', 'stmts'];
+
     /**
      * Constructs a function node.
      *
@@ -50,10 +52,12 @@ public function __construct($name, array $subNodes = [], array $attributes = [])
         $this->attrGroups = $subNodes['attrGroups'] ?? [];
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'byRef', 'name', 'params', 'returnType', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
-
     public function returnsByRef(): bool {
         return $this->byRef;
     }
diff --git a/lib/PhpParser/Node/Stmt/Global_.php b/lib/PhpParser/Node/Stmt/Global_.php
index d3ab12fc24..1f00e8d890 100644
--- a/lib/PhpParser/Node/Stmt/Global_.php
+++ b/lib/PhpParser/Node/Stmt/Global_.php
@@ -8,6 +8,8 @@ class Global_ extends Node\Stmt {
     /** @var Node\Expr[] Variables */
     public array $vars;
 
+    private const SUBNODE_NAMES = ['vars'];
+
     /**
      * Constructs a global variables list node.
      *
@@ -19,8 +21,11 @@ public function __construct(array $vars, array $attributes = []) {
         $this->vars = $vars;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['vars'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Goto_.php b/lib/PhpParser/Node/Stmt/Goto_.php
index 26a0d01eae..0f543180c9 100644
--- a/lib/PhpParser/Node/Stmt/Goto_.php
+++ b/lib/PhpParser/Node/Stmt/Goto_.php
@@ -9,6 +9,8 @@ class Goto_ extends Stmt {
     /** @var Identifier Name of label to jump to */
     public Identifier $name;
 
+    private const SUBNODE_NAMES = ['name'];
+
     /**
      * Constructs a goto node.
      *
@@ -20,8 +22,11 @@ public function __construct($name, array $attributes = []) {
         $this->name = \is_string($name) ? new Identifier($name) : $name;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/GroupUse.php b/lib/PhpParser/Node/Stmt/GroupUse.php
index 0ec8e9d42b..4d4c6b62a4 100644
--- a/lib/PhpParser/Node/Stmt/GroupUse.php
+++ b/lib/PhpParser/Node/Stmt/GroupUse.php
@@ -16,6 +16,8 @@ class GroupUse extends Stmt {
     /** @var UseItem[] Uses */
     public array $uses;
 
+    private const SUBNODE_NAMES = ['type', 'prefix', 'uses'];
+
     /**
      * Constructs a group use node.
      *
@@ -31,10 +33,12 @@ public function __construct(Name $prefix, array $uses, int $type = Use_::TYPE_NO
         $this->uses = $uses;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['type', 'prefix', 'uses'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_GroupUse';
     }
diff --git a/lib/PhpParser/Node/Stmt/HaltCompiler.php b/lib/PhpParser/Node/Stmt/HaltCompiler.php
index 665bacdee2..590b6bb449 100644
--- a/lib/PhpParser/Node/Stmt/HaltCompiler.php
+++ b/lib/PhpParser/Node/Stmt/HaltCompiler.php
@@ -8,6 +8,8 @@ class HaltCompiler extends Stmt {
     /** @var string Remaining text after halt compiler statement. */
     public string $remaining;
 
+    private const SUBNODE_NAMES = ['remaining'];
+
     /**
      * Constructs a __halt_compiler node.
      *
@@ -19,10 +21,12 @@ public function __construct(string $remaining, array $attributes = []) {
         $this->remaining = $remaining;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['remaining'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_HaltCompiler';
     }
diff --git a/lib/PhpParser/Node/Stmt/If_.php b/lib/PhpParser/Node/Stmt/If_.php
index 544390ff5e..58e393ff16 100644
--- a/lib/PhpParser/Node/Stmt/If_.php
+++ b/lib/PhpParser/Node/Stmt/If_.php
@@ -14,6 +14,8 @@ class If_ extends Node\Stmt {
     /** @var null|Else_ Else clause */
     public ?Else_ $else;
 
+    private const SUBNODE_NAMES = ['cond', 'stmts', 'elseifs', 'else'];
+
     /**
      * Constructs an if node.
      *
@@ -36,8 +38,11 @@ public function __construct(Node\Expr $cond, array $subNodes = [], array $attrib
         $this->else = $subNodes['else'] ?? null;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['cond', 'stmts', 'elseifs', 'else'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/InlineHTML.php b/lib/PhpParser/Node/Stmt/InlineHTML.php
index 0515d02054..bb3d840c04 100644
--- a/lib/PhpParser/Node/Stmt/InlineHTML.php
+++ b/lib/PhpParser/Node/Stmt/InlineHTML.php
@@ -8,6 +8,8 @@ class InlineHTML extends Stmt {
     /** @var string String */
     public string $value;
 
+    private const SUBNODE_NAMES = ['value'];
+
     /**
      * Constructs an inline HTML node.
      *
@@ -19,10 +21,12 @@ public function __construct(string $value, array $attributes = []) {
         $this->value = $value;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['value'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_InlineHTML';
     }
diff --git a/lib/PhpParser/Node/Stmt/Interface_.php b/lib/PhpParser/Node/Stmt/Interface_.php
index 9359064f8e..1cca07f6f1 100644
--- a/lib/PhpParser/Node/Stmt/Interface_.php
+++ b/lib/PhpParser/Node/Stmt/Interface_.php
@@ -8,6 +8,8 @@ class Interface_ extends ClassLike {
     /** @var Node\Name[] Extended interfaces */
     public array $extends;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'name', 'extends', 'stmts'];
+
     /**
      * Constructs a class node.
      *
@@ -30,8 +32,11 @@ public function __construct($name, array $subNodes = [], array $attributes = [])
         $this->attrGroups = $subNodes['attrGroups'] ?? [];
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'name', 'extends', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Label.php b/lib/PhpParser/Node/Stmt/Label.php
index 658468d2f6..5fcf64e17d 100644
--- a/lib/PhpParser/Node/Stmt/Label.php
+++ b/lib/PhpParser/Node/Stmt/Label.php
@@ -9,6 +9,8 @@ class Label extends Stmt {
     /** @var Identifier Name */
     public Identifier $name;
 
+    private const SUBNODE_NAMES = ['name'];
+
     /**
      * Constructs a label node.
      *
@@ -20,10 +22,12 @@ public function __construct($name, array $attributes = []) {
         $this->name = \is_string($name) ? new Identifier($name) : $name;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_Label';
     }
diff --git a/lib/PhpParser/Node/Stmt/Namespace_.php b/lib/PhpParser/Node/Stmt/Namespace_.php
index f5b59ad6e3..54abb3dc65 100644
--- a/lib/PhpParser/Node/Stmt/Namespace_.php
+++ b/lib/PhpParser/Node/Stmt/Namespace_.php
@@ -14,6 +14,8 @@ class Namespace_ extends Node\Stmt {
     /** @var Node\Stmt[] Statements */
     public $stmts;
 
+    private const SUBNODE_NAMES = ['name', 'stmts'];
+
     /**
      * Constructs a namespace node.
      *
@@ -27,10 +29,12 @@ public function __construct(?Node\Name $name = null, ?array $stmts = [], array $
         $this->stmts = $stmts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['name', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_Namespace';
     }
diff --git a/lib/PhpParser/Node/Stmt/Property.php b/lib/PhpParser/Node/Stmt/Property.php
index 3b238c76a9..909c70463d 100644
--- a/lib/PhpParser/Node/Stmt/Property.php
+++ b/lib/PhpParser/Node/Stmt/Property.php
@@ -21,6 +21,8 @@ class Property extends Node\Stmt {
     /** @var Node\PropertyHook[] Property hooks */
     public array $hooks;
 
+    private const SUBNODE_NAMES = ['attrGroups', 'flags', 'type', 'props', 'hooks'];
+
     /**
      * Constructs a class property list node.
      *
@@ -40,8 +42,11 @@ public function __construct(int $flags, array $props, array $attributes = [], ?N
         $this->hooks = $hooks;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'flags', 'type', 'props', 'hooks'];
+        return self::SUBNODE_NAMES;
     }
 
     /**
diff --git a/lib/PhpParser/Node/Stmt/Return_.php b/lib/PhpParser/Node/Stmt/Return_.php
index 9c44cca85c..8f6fdbe635 100644
--- a/lib/PhpParser/Node/Stmt/Return_.php
+++ b/lib/PhpParser/Node/Stmt/Return_.php
@@ -8,6 +8,8 @@ class Return_ extends Node\Stmt {
     /** @var null|Node\Expr Expression */
     public ?Node\Expr $expr;
 
+    private const SUBNODE_NAMES = ['expr'];
+
     /**
      * Constructs a return node.
      *
@@ -19,8 +21,11 @@ public function __construct(?Node\Expr $expr = null, array $attributes = []) {
         $this->expr = $expr;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['expr'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/Static_.php b/lib/PhpParser/Node/Stmt/Static_.php
index a84de106ac..6f059761a8 100644
--- a/lib/PhpParser/Node/Stmt/Static_.php
+++ b/lib/PhpParser/Node/Stmt/Static_.php
@@ -9,6 +9,8 @@ class Static_ extends Stmt {
     /** @var StaticVar[] Variable definitions */
     public array $vars;
 
+    private const SUBNODE_NAMES = ['vars'];
+
     /**
      * Constructs a static variables list node.
      *
@@ -20,10 +22,12 @@ public function __construct(array $vars, array $attributes = []) {
         $this->vars = $vars;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['vars'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_Static';
     }
diff --git a/lib/PhpParser/Node/Stmt/Switch_.php b/lib/PhpParser/Node/Stmt/Switch_.php
index 21e5efa569..c3aeef2ad3 100644
--- a/lib/PhpParser/Node/Stmt/Switch_.php
+++ b/lib/PhpParser/Node/Stmt/Switch_.php
@@ -10,6 +10,8 @@ class Switch_ extends Node\Stmt {
     /** @var Case_[] Case list */
     public array $cases;
 
+    private const SUBNODE_NAMES = ['cond', 'cases'];
+
     /**
      * Constructs a case node.
      *
@@ -23,10 +25,12 @@ public function __construct(Node\Expr $cond, array $cases, array $attributes = [
         $this->cases = $cases;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['cond', 'cases'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_Switch';
     }
diff --git a/lib/PhpParser/Node/Stmt/TraitUse.php b/lib/PhpParser/Node/Stmt/TraitUse.php
index 7705a57057..4d843fbad6 100644
--- a/lib/PhpParser/Node/Stmt/TraitUse.php
+++ b/lib/PhpParser/Node/Stmt/TraitUse.php
@@ -10,6 +10,8 @@ class TraitUse extends Node\Stmt {
     /** @var TraitUseAdaptation[] Adaptations */
     public array $adaptations;
 
+    private const SUBNODE_NAMES = ['traits', 'adaptations'];
+
     /**
      * Constructs a trait use node.
      *
@@ -23,10 +25,12 @@ public function __construct(array $traits, array $adaptations = [], array $attri
         $this->adaptations = $adaptations;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['traits', 'adaptations'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_TraitUse';
     }
diff --git a/lib/PhpParser/Node/Stmt/TraitUseAdaptation/Alias.php b/lib/PhpParser/Node/Stmt/TraitUseAdaptation/Alias.php
index 449671e771..ab07ab3ad6 100644
--- a/lib/PhpParser/Node/Stmt/TraitUseAdaptation/Alias.php
+++ b/lib/PhpParser/Node/Stmt/TraitUseAdaptation/Alias.php
@@ -10,6 +10,8 @@ class Alias extends Node\Stmt\TraitUseAdaptation {
     /** @var null|Node\Identifier New name */
     public ?Node\Identifier $newName;
 
+    private const SUBNODE_NAMES = ['trait', 'method', 'newModifier', 'newName'];
+
     /**
      * Constructs a trait use precedence adaptation node.
      *
@@ -27,10 +29,12 @@ public function __construct(?Node\Name $trait, $method, ?int $newModifier, $newN
         $this->newName = \is_string($newName) ? new Node\Identifier($newName) : $newName;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['trait', 'method', 'newModifier', 'newName'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_TraitUseAdaptation_Alias';
     }
diff --git a/lib/PhpParser/Node/Stmt/TraitUseAdaptation/Precedence.php b/lib/PhpParser/Node/Stmt/TraitUseAdaptation/Precedence.php
index 7bc4083769..c26f3d1828 100644
--- a/lib/PhpParser/Node/Stmt/TraitUseAdaptation/Precedence.php
+++ b/lib/PhpParser/Node/Stmt/TraitUseAdaptation/Precedence.php
@@ -8,6 +8,8 @@ class Precedence extends Node\Stmt\TraitUseAdaptation {
     /** @var Node\Name[] Overwritten traits */
     public array $insteadof;
 
+    private const SUBNODE_NAMES = ['trait', 'method', 'insteadof'];
+
     /**
      * Constructs a trait use precedence adaptation node.
      *
@@ -23,10 +25,12 @@ public function __construct(Node\Name $trait, $method, array $insteadof, array $
         $this->insteadof = $insteadof;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['trait', 'method', 'insteadof'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_TraitUseAdaptation_Precedence';
     }
diff --git a/lib/PhpParser/Node/Stmt/Trait_.php b/lib/PhpParser/Node/Stmt/Trait_.php
index 5f2b33070a..b0f796b63a 100644
--- a/lib/PhpParser/Node/Stmt/Trait_.php
+++ b/lib/PhpParser/Node/Stmt/Trait_.php
@@ -5,6 +5,8 @@
 use PhpParser\Node;
 
 class Trait_ extends ClassLike {
+    private const SUBNODE_NAMES = ['attrGroups', 'name', 'stmts'];
+
     /**
      * Constructs a trait node.
      *
@@ -24,10 +26,12 @@ public function __construct($name, array $subNodes = [], array $attributes = [])
         $this->attrGroups = $subNodes['attrGroups'] ?? [];
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['attrGroups', 'name', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_Trait';
     }
diff --git a/lib/PhpParser/Node/Stmt/TryCatch.php b/lib/PhpParser/Node/Stmt/TryCatch.php
index 6414c46c94..7a47e79a3a 100644
--- a/lib/PhpParser/Node/Stmt/TryCatch.php
+++ b/lib/PhpParser/Node/Stmt/TryCatch.php
@@ -12,6 +12,8 @@ class TryCatch extends Node\Stmt {
     /** @var null|Finally_ Optional finally node */
     public ?Finally_ $finally;
 
+    private const SUBNODE_NAMES = ['stmts', 'catches', 'finally'];
+
     /**
      * Constructs a try catch node.
      *
@@ -27,10 +29,12 @@ public function __construct(array $stmts, array $catches, ?Finally_ $finally = n
         $this->finally = $finally;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['stmts', 'catches', 'finally'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_TryCatch';
     }
diff --git a/lib/PhpParser/Node/Stmt/Unset_.php b/lib/PhpParser/Node/Stmt/Unset_.php
index c211beb0c5..ffe2cc0505 100644
--- a/lib/PhpParser/Node/Stmt/Unset_.php
+++ b/lib/PhpParser/Node/Stmt/Unset_.php
@@ -8,6 +8,8 @@ class Unset_ extends Node\Stmt {
     /** @var Node\Expr[] Variables to unset */
     public array $vars;
 
+    private const SUBNODE_NAMES = ['vars'];
+
     /**
      * Constructs an unset node.
      *
@@ -19,10 +21,12 @@ public function __construct(array $vars, array $attributes = []) {
         $this->vars = $vars;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['vars'];
+        return self::SUBNODE_NAMES;
     }
-
     public function getType(): string {
         return 'Stmt_Unset';
     }
diff --git a/lib/PhpParser/Node/Stmt/Use_.php b/lib/PhpParser/Node/Stmt/Use_.php
index 5b2d864832..46f4e2eb98 100644
--- a/lib/PhpParser/Node/Stmt/Use_.php
+++ b/lib/PhpParser/Node/Stmt/Use_.php
@@ -24,6 +24,8 @@ class Use_ extends Stmt {
     /** @var UseItem[] Aliases */
     public array $uses;
 
+    private const SUBNODE_NAMES = ['type', 'uses'];
+
     /**
      * Constructs an alias (use) list node.
      *
@@ -37,8 +39,11 @@ public function __construct(array $uses, int $type = self::TYPE_NORMAL, array $a
         $this->uses = $uses;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['type', 'uses'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/Stmt/While_.php b/lib/PhpParser/Node/Stmt/While_.php
index 2f7aed2343..abdb3f1e77 100644
--- a/lib/PhpParser/Node/Stmt/While_.php
+++ b/lib/PhpParser/Node/Stmt/While_.php
@@ -10,6 +10,8 @@ class While_ extends Node\Stmt {
     /** @var Node\Stmt[] Statements */
     public array $stmts;
 
+    private const SUBNODE_NAMES = ['cond', 'stmts'];
+
     /**
      * Constructs a while node.
      *
@@ -23,8 +25,11 @@ public function __construct(Node\Expr $cond, array $stmts = [], array $attribute
         $this->stmts = $stmts;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['cond', 'stmts'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/UnionType.php b/lib/PhpParser/Node/UnionType.php
index bad88d2b8b..b27f74e3dc 100644
--- a/lib/PhpParser/Node/UnionType.php
+++ b/lib/PhpParser/Node/UnionType.php
@@ -6,6 +6,8 @@ class UnionType extends ComplexType {
     /** @var (Identifier|Name|IntersectionType)[] Types */
     public array $types;
 
+    private const SUBNODE_NAMES = ['types'];
+
     /**
      * Constructs a union type.
      *
@@ -17,8 +19,11 @@ public function __construct(array $types, array $attributes = []) {
         $this->types = $types;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['types'];
+        return self::SUBNODE_NAMES;
     }
 
     public function getType(): string {
diff --git a/lib/PhpParser/Node/UseItem.php b/lib/PhpParser/Node/UseItem.php
index a7d9fc447c..e836a43f25 100644
--- a/lib/PhpParser/Node/UseItem.php
+++ b/lib/PhpParser/Node/UseItem.php
@@ -16,6 +16,8 @@ class UseItem extends NodeAbstract {
     /** @var Identifier|null Alias */
     public ?Identifier $alias;
 
+    private const SUBNODE_NAMES = ['type', 'name', 'alias'];
+
     /**
      * Constructs an alias (use) item node.
      *
@@ -31,8 +33,11 @@ public function __construct(Node\Name $name, $alias = null, int $type = Use_::TY
         $this->alias = \is_string($alias) ? new Identifier($alias) : $alias;
     }
 
+    /**
+     * @return self::SUBNODE_NAMES
+     */
     public function getSubNodeNames(): array {
-        return ['type', 'name', 'alias'];
+        return self::SUBNODE_NAMES;
     }
 
     /**