code: public Observable<Integer> getTaggedImageCountAsync(UUID projectId, GetTaggedImageCountOptionalParameter getTaggedImageCountOptionalParameter) {
          return getTaggedImageCountWithServiceResponseAsync(projectId, getTaggedImageCountOptionalParameter).map(new Func1<ServiceResponse<Integer>, Integer>() {
              @Override
              public Integer call(ServiceResponse<Integer> response) {
                  return response.body();
              }
          });
      }
docs: Gets the number of images tagged with the provided {tagIds}.
  The filtering is on an and/or relationship. For example, if the provided tag ids are for the "Dog" and
  "Cat" tags, then only images tagged with Dog and/or Cat will be returned.
  
  @param projectId The project id
  @param getTaggedImageCountOptionalParameter 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