diff --git a/AnalyticsData/metadata/V1Alpha/Data.php b/AnalyticsData/metadata/V1Alpha/Data.php
index e82dcc15264d..7d2de72a86be 100644
Binary files a/AnalyticsData/metadata/V1Alpha/Data.php and b/AnalyticsData/metadata/V1Alpha/Data.php differ
diff --git a/AnalyticsData/src/V1alpha/EmptyFilter.php b/AnalyticsData/src/V1alpha/EmptyFilter.php
new file mode 100644
index 000000000000..2b44c2ba4688
--- /dev/null
+++ b/AnalyticsData/src/V1alpha/EmptyFilter.php
@@ -0,0 +1,33 @@
+<?php
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/analytics/data/v1alpha/data.proto
+
+namespace Google\Analytics\Data\V1alpha;
+
+use Google\Protobuf\Internal\GPBType;
+use Google\Protobuf\Internal\RepeatedField;
+use Google\Protobuf\Internal\GPBUtil;
+
+/**
+ * Filter for empty values.
+ *
+ * Generated from protobuf message <code>google.analytics.data.v1alpha.EmptyFilter</code>
+ */
+class EmptyFilter extends \Google\Protobuf\Internal\Message
+{
+
+    /**
+     * Constructor.
+     *
+     * @param array $data {
+     *     Optional. Data for populating the Message object.
+     *
+     * }
+     */
+    public function __construct($data = NULL) {
+        \GPBMetadata\Google\Analytics\Data\V1Alpha\Data::initOnce();
+        parent::__construct($data);
+    }
+
+}
+
diff --git a/AnalyticsData/src/V1alpha/Filter.php b/AnalyticsData/src/V1alpha/Filter.php
index 06dfb9994435..6c758aa91778 100644
--- a/AnalyticsData/src/V1alpha/Filter.php
+++ b/AnalyticsData/src/V1alpha/Filter.php
@@ -41,6 +41,8 @@ class Filter extends \Google\Protobuf\Internal\Message
      *           A filter for numeric or date values.
      *     @type \Google\Analytics\Data\V1alpha\BetweenFilter $between_filter
      *           A filter for between two values.
+     *     @type \Google\Analytics\Data\V1alpha\EmptyFilter $empty_filter
+     *           A filter for empty values such as "(not set)" and "" values.
      * }
      */
     public function __construct($data = NULL) {
@@ -200,6 +202,37 @@ public function setBetweenFilter($var)
         return $this;
     }
 
+    /**
+     * A filter for empty values such as "(not set)" and "" values.
+     *
+     * Generated from protobuf field <code>.google.analytics.data.v1alpha.EmptyFilter empty_filter = 6;</code>
+     * @return \Google\Analytics\Data\V1alpha\EmptyFilter|null
+     */
+    public function getEmptyFilter()
+    {
+        return $this->readOneof(6);
+    }
+
+    public function hasEmptyFilter()
+    {
+        return $this->hasOneof(6);
+    }
+
+    /**
+     * A filter for empty values such as "(not set)" and "" values.
+     *
+     * Generated from protobuf field <code>.google.analytics.data.v1alpha.EmptyFilter empty_filter = 6;</code>
+     * @param \Google\Analytics\Data\V1alpha\EmptyFilter $var
+     * @return $this
+     */
+    public function setEmptyFilter($var)
+    {
+        GPBUtil::checkMessage($var, \Google\Analytics\Data\V1alpha\EmptyFilter::class);
+        $this->writeOneof(6, $var);
+
+        return $this;
+    }
+
     /**
      * @return string
      */
diff --git a/AnalyticsData/src/V1alpha/FunnelResponseMetadata.php b/AnalyticsData/src/V1alpha/FunnelResponseMetadata.php
index 78714d6506c6..e3b524be392e 100644
--- a/AnalyticsData/src/V1alpha/FunnelResponseMetadata.php
+++ b/AnalyticsData/src/V1alpha/FunnelResponseMetadata.php
@@ -21,8 +21,8 @@ class FunnelResponseMetadata extends \Google\Protobuf\Internal\Message
      * [sampled](https://support.google.com/analytics/answer/13331292), this
      * describes what percentage of events were used in this funnel report. One
      * `samplingMetadatas` is populated for each date range. Each
-     * `samplingMetadatas` corresponds to a date range in order that date ranges
-     * were specified in the request.
+     * `samplingMetadatas` corresponds to a date range in the order that date
+     * ranges were specified in the request.
      * However if the results are not sampled, this field will not be defined.
      *
      * Generated from protobuf field <code>repeated .google.analytics.data.v1alpha.SamplingMetadata sampling_metadatas = 1;</code>
@@ -40,8 +40,8 @@ class FunnelResponseMetadata extends \Google\Protobuf\Internal\Message
      *           [sampled](https://support.google.com/analytics/answer/13331292), this
      *           describes what percentage of events were used in this funnel report. One
      *           `samplingMetadatas` is populated for each date range. Each
-     *           `samplingMetadatas` corresponds to a date range in order that date ranges
-     *           were specified in the request.
+     *           `samplingMetadatas` corresponds to a date range in the order that date
+     *           ranges were specified in the request.
      *           However if the results are not sampled, this field will not be defined.
      * }
      */
@@ -55,8 +55,8 @@ public function __construct($data = NULL) {
      * [sampled](https://support.google.com/analytics/answer/13331292), this
      * describes what percentage of events were used in this funnel report. One
      * `samplingMetadatas` is populated for each date range. Each
-     * `samplingMetadatas` corresponds to a date range in order that date ranges
-     * were specified in the request.
+     * `samplingMetadatas` corresponds to a date range in the order that date
+     * ranges were specified in the request.
      * However if the results are not sampled, this field will not be defined.
      *
      * Generated from protobuf field <code>repeated .google.analytics.data.v1alpha.SamplingMetadata sampling_metadatas = 1;</code>
@@ -72,8 +72,8 @@ public function getSamplingMetadatas()
      * [sampled](https://support.google.com/analytics/answer/13331292), this
      * describes what percentage of events were used in this funnel report. One
      * `samplingMetadatas` is populated for each date range. Each
-     * `samplingMetadatas` corresponds to a date range in order that date ranges
-     * were specified in the request.
+     * `samplingMetadatas` corresponds to a date range in the order that date
+     * ranges were specified in the request.
      * However if the results are not sampled, this field will not be defined.
      *
      * Generated from protobuf field <code>repeated .google.analytics.data.v1alpha.SamplingMetadata sampling_metadatas = 1;</code>
diff --git a/AnalyticsData/src/V1alpha/ResponseMetaData.php b/AnalyticsData/src/V1alpha/ResponseMetaData.php
index 8874cfd66fc9..d0b7c3744a18 100644
--- a/AnalyticsData/src/V1alpha/ResponseMetaData.php
+++ b/AnalyticsData/src/V1alpha/ResponseMetaData.php
@@ -81,6 +81,18 @@ class ResponseMetaData extends \Google\Protobuf\Internal\Message
      * Generated from protobuf field <code>optional bool subject_to_thresholding = 8;</code>
      */
     private $subject_to_thresholding = null;
+    /**
+     * If this report's results are
+     * [sampled](https://support.google.com/analytics/answer/13331292), this
+     * describes the percentage of events used in this report. One
+     * `samplingMetadatas` is populated for each date range. Each
+     * `samplingMetadatas` corresponds to a date range in the order that date
+     * ranges were specified in the request.
+     * However if the results are not sampled, this field will not be defined.
+     *
+     * Generated from protobuf field <code>repeated .google.analytics.data.v1alpha.SamplingMetadata sampling_metadatas = 9;</code>
+     */
+    private $sampling_metadatas;
 
     /**
      * Constructor.
@@ -130,6 +142,14 @@ class ResponseMetaData extends \Google\Protobuf\Internal\Message
      *           thresholds](https://support.google.com/analytics/answer/9383630) and [About
      *           Demographics and
      *           Interests](https://support.google.com/analytics/answer/2799357).
+     *     @type array<\Google\Analytics\Data\V1alpha\SamplingMetadata>|\Google\Protobuf\Internal\RepeatedField $sampling_metadatas
+     *           If this report's results are
+     *           [sampled](https://support.google.com/analytics/answer/13331292), this
+     *           describes the percentage of events used in this report. One
+     *           `samplingMetadatas` is populated for each date range. Each
+     *           `samplingMetadatas` corresponds to a date range in the order that date
+     *           ranges were specified in the request.
+     *           However if the results are not sampled, this field will not be defined.
      * }
      */
     public function __construct($data = NULL) {
@@ -403,5 +423,43 @@ public function setSubjectToThresholding($var)
         return $this;
     }
 
+    /**
+     * If this report's results are
+     * [sampled](https://support.google.com/analytics/answer/13331292), this
+     * describes the percentage of events used in this report. One
+     * `samplingMetadatas` is populated for each date range. Each
+     * `samplingMetadatas` corresponds to a date range in the order that date
+     * ranges were specified in the request.
+     * However if the results are not sampled, this field will not be defined.
+     *
+     * Generated from protobuf field <code>repeated .google.analytics.data.v1alpha.SamplingMetadata sampling_metadatas = 9;</code>
+     * @return \Google\Protobuf\Internal\RepeatedField
+     */
+    public function getSamplingMetadatas()
+    {
+        return $this->sampling_metadatas;
+    }
+
+    /**
+     * If this report's results are
+     * [sampled](https://support.google.com/analytics/answer/13331292), this
+     * describes the percentage of events used in this report. One
+     * `samplingMetadatas` is populated for each date range. Each
+     * `samplingMetadatas` corresponds to a date range in the order that date
+     * ranges were specified in the request.
+     * However if the results are not sampled, this field will not be defined.
+     *
+     * Generated from protobuf field <code>repeated .google.analytics.data.v1alpha.SamplingMetadata sampling_metadatas = 9;</code>
+     * @param array<\Google\Analytics\Data\V1alpha\SamplingMetadata>|\Google\Protobuf\Internal\RepeatedField $var
+     * @return $this
+     */
+    public function setSamplingMetadatas($var)
+    {
+        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::MESSAGE, \Google\Analytics\Data\V1alpha\SamplingMetadata::class);
+        $this->sampling_metadatas = $arr;
+
+        return $this;
+    }
+
 }