Fix MultiSearch functionality

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/AsyncSearch/SubmitAsyncSearchRequest.g.cs

@@ -958,7 +958,7 @@ public SubmitAsyncSearchRequestDescriptor(Elastic.Clients.Elasticsearch.Serverle
 	{
 	}
 
-	public SubmitAsyncSearchRequestDescriptor() : this(typeof(TDocument))
+	public SubmitAsyncSearchRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/Cluster/HealthRequest.g.cs

@@ -186,7 +186,7 @@ public HealthRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indices?
 	{
 	}
 
-	public HealthRequestDescriptor() : this(typeof(TDocument))
+	public HealthRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/CountRequest.g.cs

@@ -225,7 +225,7 @@ public CountRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indices?
 	{
 	}
 
-	public CountRequestDescriptor() : this(typeof(TDocument))
+	public CountRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/FieldCapsRequest.g.cs

@@ -161,7 +161,7 @@ public FieldCapsRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indic
 	{
 	}
 
-	public FieldCapsRequestDescriptor() : this(typeof(TDocument))
+	public FieldCapsRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/ClearCacheRequest.g.cs

@@ -142,7 +142,7 @@ public ClearCacheRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indi
 	{
 	}
 
-	public ClearCacheRequestDescriptor() : this(typeof(TDocument))
+	public ClearCacheRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/ExistsAliasRequest.g.cs

@@ -109,7 +109,7 @@ public ExistsAliasRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Ind
 	{
 	}
 
-	public ExistsAliasRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Names name) : this(typeof(TDocument), name)
+	public ExistsAliasRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Names name) : base(r => r.Required("name", name))
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/FlushRequest.g.cs

@@ -120,7 +120,7 @@ public FlushRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indices?
 	{
 	}
 
-	public FlushRequestDescriptor() : this(typeof(TDocument))
+	public FlushRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/ForcemergeRequest.g.cs

@@ -142,7 +142,7 @@ public ForcemergeRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indi
 	{
 	}
 
-	public ForcemergeRequestDescriptor() : this(typeof(TDocument))
+	public ForcemergeRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/GetAliasRequest.g.cs

@@ -117,10 +117,6 @@ public GetAliasRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indice
 	{
 	}
 
-	public GetAliasRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Names? name) : this(typeof(TDocument), name)
-	{
-	}
-
 	public GetAliasRequestDescriptor()
 	{
 	}

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/GetIndicesSettingsRequest.g.cs

@@ -150,10 +150,6 @@ public GetIndicesSettingsRequestDescriptor(Elastic.Clients.Elasticsearch.Serverl
 	{
 	}
 
-	public GetIndicesSettingsRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Names? name) : this(typeof(TDocument), name)
-	{
-	}
-
 	public GetIndicesSettingsRequestDescriptor()
 	{
 	}

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/GetMappingRequest.g.cs

@@ -120,7 +120,7 @@ public GetMappingRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indi
 	{
 	}
 
-	public GetMappingRequestDescriptor() : this(typeof(TDocument))
+	public GetMappingRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/IndicesStatsRequest.g.cs

@@ -172,10 +172,6 @@ public IndicesStatsRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.In
 	{
 	}
 
-	public IndicesStatsRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Metrics? metric) : this(typeof(TDocument), metric)
-	{
-	}
-
 	public IndicesStatsRequestDescriptor()
 	{
 	}

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/RecoveryRequest.g.cs

@@ -87,7 +87,7 @@ public RecoveryRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indice
 	{
 	}
 
-	public RecoveryRequestDescriptor() : this(typeof(TDocument))
+	public RecoveryRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/RefreshRequest.g.cs

@@ -98,7 +98,7 @@ public RefreshRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indices
 	{
 	}
 
-	public RefreshRequestDescriptor() : this(typeof(TDocument))
+	public RefreshRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/SegmentsRequest.g.cs

@@ -109,7 +109,7 @@ public SegmentsRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indice
 	{
 	}
 
-	public SegmentsRequestDescriptor() : this(typeof(TDocument))
+	public SegmentsRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/IndexManagement/ValidateQueryRequest.g.cs

@@ -203,7 +203,7 @@ public ValidateQueryRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.I
 	{
 	}
 
-	public ValidateQueryRequestDescriptor() : this(typeof(TDocument))
+	public ValidateQueryRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/MultiSearchRequest.g.cs

@@ -214,15 +214,15 @@ async Task IStreamSerializable.SerializeAsync(Stream stream, IElasticsearchClien
 /// <summary>
 /// <para>Allows to execute several search operations in one request.</para>
 /// </summary>
-public sealed partial class MultiSearchRequestDescriptor<TDocument> : RequestDescriptor<MultiSearchRequestDescriptor<TDocument>, MultiSearchRequestParameters>
+public sealed partial class MultiSearchRequestDescriptor<TDocument> : RequestDescriptor<MultiSearchRequestDescriptor<TDocument>, MultiSearchRequestParameters>, IStreamSerializable
 {
 	internal MultiSearchRequestDescriptor(Action<MultiSearchRequestDescriptor<TDocument>> configure) => configure.Invoke(this);
 
 	public MultiSearchRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indices? indices) : base(r => r.Optional("index", indices))
 	{
 	}
 
-	public MultiSearchRequestDescriptor() : this(typeof(TDocument))
+	public MultiSearchRequestDescriptor()
 	{
 	}
 
@@ -259,6 +259,28 @@ protected override void Serialize(Utf8JsonWriter writer, JsonSerializerOptions o
 
 	List<Elastic.Clients.Elasticsearch.Serverless.Core.MSearch.SearchRequestItem> _items = new();
 
+	void IStreamSerializable.Serialize(Stream stream, IElasticsearchClientSettings settings, SerializationFormatting formatting)
+	{
+		if (_items is null)
+			return;
+		foreach (var item in _items)
+		{
+			if (item is IStreamSerializable serializable)
+				serializable.Serialize(stream, settings, formatting);
+		}
+	}
+
+	async Task IStreamSerializable.SerializeAsync(Stream stream, IElasticsearchClientSettings settings, SerializationFormatting formatting)
+	{
+		if (_items is null)
+			return;
+		foreach (var item in _items)
+		{
+			if (item is IStreamSerializable serializable)
+				await serializable.SerializeAsync(stream, settings, formatting).ConfigureAwait(false);
+		}
+	}
+
 	public MultiSearchRequestDescriptor<TDocument> AddSearches(Elastic.Clients.Elasticsearch.Serverless.Core.MSearch.SearchRequestItem searches)
 	{
 		_items.Add(searches);
@@ -269,7 +291,7 @@ public MultiSearchRequestDescriptor<TDocument> AddSearches(Elastic.Clients.Elast
 /// <summary>
 /// <para>Allows to execute several search operations in one request.</para>
 /// </summary>
-public sealed partial class MultiSearchRequestDescriptor : RequestDescriptor<MultiSearchRequestDescriptor, MultiSearchRequestParameters>
+public sealed partial class MultiSearchRequestDescriptor : RequestDescriptor<MultiSearchRequestDescriptor, MultiSearchRequestParameters>, IStreamSerializable
 {
 	internal MultiSearchRequestDescriptor(Action<MultiSearchRequestDescriptor> configure) => configure.Invoke(this);
 
@@ -314,6 +336,28 @@ protected override void Serialize(Utf8JsonWriter writer, JsonSerializerOptions o
 
 	List<Elastic.Clients.Elasticsearch.Serverless.Core.MSearch.SearchRequestItem> _items = new();
 
+	void IStreamSerializable.Serialize(Stream stream, IElasticsearchClientSettings settings, SerializationFormatting formatting)
+	{
+		if (_items is null)
+			return;
+		foreach (var item in _items)
+		{
+			if (item is IStreamSerializable serializable)
+				serializable.Serialize(stream, settings, formatting);
+		}
+	}
+
+	async Task IStreamSerializable.SerializeAsync(Stream stream, IElasticsearchClientSettings settings, SerializationFormatting formatting)
+	{
+		if (_items is null)
+			return;
+		foreach (var item in _items)
+		{
+			if (item is IStreamSerializable serializable)
+				await serializable.SerializeAsync(stream, settings, formatting).ConfigureAwait(false);
+		}
+	}
+
 	public MultiSearchRequestDescriptor AddSearches(Elastic.Clients.Elasticsearch.Serverless.Core.MSearch.SearchRequestItem searches)
 	{
 		_items.Add(searches);

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/MultiSearchTemplateRequest.g.cs

@@ -137,15 +137,15 @@ async Task IStreamSerializable.SerializeAsync(Stream stream, IElasticsearchClien
 /// <summary>
 /// <para>Runs multiple templated searches with a single request.</para>
 /// </summary>
-public sealed partial class MultiSearchTemplateRequestDescriptor<TDocument> : RequestDescriptor<MultiSearchTemplateRequestDescriptor<TDocument>, MultiSearchTemplateRequestParameters>
+public sealed partial class MultiSearchTemplateRequestDescriptor<TDocument> : RequestDescriptor<MultiSearchTemplateRequestDescriptor<TDocument>, MultiSearchTemplateRequestParameters>, IStreamSerializable
 {
 	internal MultiSearchTemplateRequestDescriptor(Action<MultiSearchTemplateRequestDescriptor<TDocument>> configure) => configure.Invoke(this);
 
 	public MultiSearchTemplateRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indices? indices) : base(r => r.Optional("index", indices))
 	{
 	}
 
-	public MultiSearchTemplateRequestDescriptor() : this(typeof(TDocument))
+	public MultiSearchTemplateRequestDescriptor()
 	{
 	}
 
@@ -175,6 +175,28 @@ protected override void Serialize(Utf8JsonWriter writer, JsonSerializerOptions o
 
 	List<Elastic.Clients.Elasticsearch.Serverless.Core.MSearchTemplate.SearchTemplateRequestItem> _items = new();
 
+	void IStreamSerializable.Serialize(Stream stream, IElasticsearchClientSettings settings, SerializationFormatting formatting)
+	{
+		if (_items is null)
+			return;
+		foreach (var item in _items)
+		{
+			if (item is IStreamSerializable serializable)
+				serializable.Serialize(stream, settings, formatting);
+		}
+	}
+
+	async Task IStreamSerializable.SerializeAsync(Stream stream, IElasticsearchClientSettings settings, SerializationFormatting formatting)
+	{
+		if (_items is null)
+			return;
+		foreach (var item in _items)
+		{
+			if (item is IStreamSerializable serializable)
+				await serializable.SerializeAsync(stream, settings, formatting).ConfigureAwait(false);
+		}
+	}
+
 	public MultiSearchTemplateRequestDescriptor<TDocument> AddSearchTemplates(Elastic.Clients.Elasticsearch.Serverless.Core.MSearchTemplate.SearchTemplateRequestItem searchTemplates)
 	{
 		_items.Add(searchTemplates);
@@ -185,7 +207,7 @@ public MultiSearchTemplateRequestDescriptor<TDocument> AddSearchTemplates(Elasti
 /// <summary>
 /// <para>Runs multiple templated searches with a single request.</para>
 /// </summary>
-public sealed partial class MultiSearchTemplateRequestDescriptor : RequestDescriptor<MultiSearchTemplateRequestDescriptor, MultiSearchTemplateRequestParameters>
+public sealed partial class MultiSearchTemplateRequestDescriptor : RequestDescriptor<MultiSearchTemplateRequestDescriptor, MultiSearchTemplateRequestParameters>, IStreamSerializable
 {
 	internal MultiSearchTemplateRequestDescriptor(Action<MultiSearchTemplateRequestDescriptor> configure) => configure.Invoke(this);
 
@@ -223,6 +245,28 @@ protected override void Serialize(Utf8JsonWriter writer, JsonSerializerOptions o
 
 	List<Elastic.Clients.Elasticsearch.Serverless.Core.MSearchTemplate.SearchTemplateRequestItem> _items = new();
 
+	void IStreamSerializable.Serialize(Stream stream, IElasticsearchClientSettings settings, SerializationFormatting formatting)
+	{
+		if (_items is null)
+			return;
+		foreach (var item in _items)
+		{
+			if (item is IStreamSerializable serializable)
+				serializable.Serialize(stream, settings, formatting);
+		}
+	}
+
+	async Task IStreamSerializable.SerializeAsync(Stream stream, IElasticsearchClientSettings settings, SerializationFormatting formatting)
+	{
+		if (_items is null)
+			return;
+		foreach (var item in _items)
+		{
+			if (item is IStreamSerializable serializable)
+				await serializable.SerializeAsync(stream, settings, formatting).ConfigureAwait(false);
+		}
+	}
+
 	public MultiSearchTemplateRequestDescriptor AddSearchTemplates(Elastic.Clients.Elasticsearch.Serverless.Core.MSearchTemplate.SearchTemplateRequestItem searchTemplates)
 	{
 		_items.Add(searchTemplates);

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/RankEvalRequest.g.cs

@@ -121,7 +121,7 @@ public RankEvalRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indice
 	{
 	}
 
-	public RankEvalRequestDescriptor() : this(typeof(TDocument))
+	public RankEvalRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/SearchRequest.g.cs

@@ -1007,7 +1007,7 @@ public SearchRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.Indices?
 	{
 	}
 
-	public SearchRequestDescriptor() : this(typeof(TDocument))
+	public SearchRequestDescriptor()
 	{
 	}
 

src/Elastic.Clients.Elasticsearch.Serverless/_Generated/Api/SearchTemplateRequest.g.cs

@@ -216,7 +216,7 @@ public SearchTemplateRequestDescriptor(Elastic.Clients.Elasticsearch.Serverless.
 	{
 	}
 
-	public SearchTemplateRequestDescriptor() : this(typeof(TDocument))
+	public SearchTemplateRequestDescriptor()
 	{
 	}