Adjust handcrafted code

Author: flobernd

src/Elastic.Clients.Elasticsearch/_Shared/Api/GetSourceResponse.cs

@@ -8,6 +8,6 @@ namespace Elastic.Clients.Elasticsearch;
 
 public partial class GetSourceResponse<TDocument>
 {
-	[Obsolete($"Use '{nameof(Document)}' instead.")]
-	public TDocument Body { get => Document; set => Document = value; }
+	[Obsolete($"Use '{nameof(Source)}' instead.")]
+	public TDocument Body { get => Source; set => Source = value; }
 }

src/Elastic.Clients.Elasticsearch/_Shared/Api/IndexManagement/GetFieldMappingResponse.cs

@@ -60,7 +60,7 @@ public bool TryGetProperty(string index, string field, [NotNullWhen(true)] out I
 
 	private IReadOnlyDictionary<string, FieldMapping>? MappingsFor(string index)
 	{
-		if (Values!.TryGetValue(index, out var indexMapping))
+		if (!FieldMappings.TryGetValue(index, out var indexMapping))
 			return null;
 
 		return indexMapping.Mappings;

src/Elastic.Clients.Elasticsearch/_Shared/Api/IndexManagement/GetMappingResponse.cs

@@ -13,6 +13,6 @@ public static class GetMappingResponseExtensions
 		if (index.IsNullOrEmpty())
 			return null;
 
-		return response.Values.TryGetValue(index, out var indexMappings) ? indexMappings.Mappings : null;
+		return response.Mappings.TryGetValue(index, out var indexMappings) ? indexMappings.Mappings : null;
 	}
 }