Revert "Skip intermediate class"

This reverts commit 3b71a0d.

Author: pquentin

output/openapi/elasticsearch-openapi.json

@@ -426,7 +426,7 @@ export class MappingLimitSettings {
   nested_objects?: MappingLimitSettingsNestedObjects
   field_name_length?: MappingLimitSettingsFieldNameLength
   dimension_fields?: MappingLimitSettingsDimensionFields
-  'source.mode'?: SourceMode
+  source?: MappingLimitSettingsSourceFields
   ignore_malformed?: boolean | string
 }
 
@@ -494,6 +494,10 @@ export class MappingLimitSettingsDimensionFields {
   limit?: long
 }
 
+export class MappingLimitSettingsSourceFields {
+  mode: SourceMode
+}
+
 export enum SourceMode {
   disabled,
   stored,