code: public Observable<Integer> addSubListAsync(UUID appId, String versionId, UUID clEntityId, WordListObject wordListCreateObject) {
          return addSubListWithServiceResponseAsync(appId, versionId, clEntityId, wordListCreateObject).map(new Func1<ServiceResponse<Integer>, Integer>() {
              @Override
              public Integer call(ServiceResponse<Integer> response) {
                  return response.body();
              }
          });
      }
docs: Adds a list to an existing closed list.
  
  @param appId The application ID.
  @param versionId The version ID.
  @param clEntityId The closed list entity extractor ID.
  @param wordListCreateObject Words list.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the Integer object