code: public Observable<Iteration> getIterationAsync(UUID projectId, UUID iterationId) {
          return getIterationWithServiceResponseAsync(projectId, iterationId).map(new Func1<ServiceResponse<Iteration>, Iteration>() {
              @Override
              public Iteration call(ServiceResponse<Iteration> response) {
                  return response.body();
              }
          });
      }
docs: Get a specific iteration.
  
  @param projectId The id of the project the iteration belongs to
  @param iterationId The id of the iteration to get
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the Iteration object