code: public static CreateUpdateEntitiesResult fromJson(String json) throws AtlasServiceException {
  
          GuidMapping guidMapping = AtlasType.fromJson(json, GuidMapping.class);
          EntityResult entityResult = EntityResult.fromString(json);
          CreateUpdateEntitiesResult result = new CreateUpdateEntitiesResult();
          result.setEntityResult(entityResult);
          result.setGuidMapping(guidMapping);
          return result;
      }
docs: Deserializes the given json into an instance of
  CreateUpdateEntitiesResult.
  
  @param json
  the (unmodified) json that comes back from Atlas.
  @return
  @throws AtlasServiceException