GraphQL DX: Relation/Pointer (#5946)

* Add a test on deep complex GraphQL Query

* Relation/Pointer new DX + deep nested mutations

* Fix lint

* Review

* Remove unnecessary code

* Fix objectId on update

src/GraphQL/parseGraphQLUtils.js

@@ -39,3 +39,7 @@ export const extractKeysAndInclude = selectedFields => {
   }
   return { keys, include };
 };
+
+export const getParseClassMutationConfig = function(parseClassConfig) {
+  return (parseClassConfig && parseClassConfig.mutation) || {};
+};