code: public Observable<ClosedListEntityExtractor> getClosedListAsync(UUID appId, String versionId, UUID clEntityId) {
          return getClosedListWithServiceResponseAsync(appId, versionId, clEntityId).map(new Func1<ServiceResponse<ClosedListEntityExtractor>, ClosedListEntityExtractor>() {
              @Override
              public ClosedListEntityExtractor call(ServiceResponse<ClosedListEntityExtractor> response) {
                  return response.body();
              }
          });
      }
docs: Gets information of a closed list model.
  
  @param appId The application ID.
  @param versionId The version ID.
  @param clEntityId The closed list model ID.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ClosedListEntityExtractor object