code: public Observable<Iteration> trainProjectAsync(UUID projectId) {
          return trainProjectWithServiceResponseAsync(projectId).map(new Func1<ServiceResponse<Iteration>, Iteration>() {
              @Override
              public Iteration call(ServiceResponse<Iteration> response) {
                  return response.body();
              }
          });
      }
docs: Queues project for training.
  
  @param projectId The project id
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the Iteration object