code: public Observable<Integer> getUntaggedImageCountAsync(UUID projectId, GetUntaggedImageCountOptionalParameter getUntaggedImageCountOptionalParameter) {
          return getUntaggedImageCountWithServiceResponseAsync(projectId, getUntaggedImageCountOptionalParameter).map(new Func1<ServiceResponse<Integer>, Integer>() {
              @Override
              public Integer call(ServiceResponse<Integer> response) {
                  return response.body();
              }
          });
      }
docs: Gets the number of untagged images.
  This API returns the images which have no tags for a given project and optionally an iteration. If no iteration is specified the
  current workspace is used.
  
  @param projectId The project id
  @param getUntaggedImageCountOptionalParameter the object representing the optional parameters to be set before calling this API
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the Integer object