code: public Observable<List<Iteration>> getIterationsAsync(UUID projectId) {
          return getIterationsWithServiceResponseAsync(projectId).map(new Func1<ServiceResponse<List<Iteration>>, List<Iteration>>() {
              @Override
              public List<Iteration> call(ServiceResponse<List<Iteration>> response) {
                  return response.body();
              }
          });
      }
docs: Get iterations for the project.
  
  @param projectId The project id
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the List&lt;Iteration&gt; object