code: public Observable<ListLabsResponseInner> listLabsAsync(String userName) {
          return listLabsWithServiceResponseAsync(userName).map(new Func1<ServiceResponse<ListLabsResponseInner>, ListLabsResponseInner>() {
              @Override
              public ListLabsResponseInner call(ServiceResponse<ListLabsResponseInner> response) {
                  return response.body();
              }
          });
      }
docs: List labs for the user.
  
  @param userName The name of the user.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ListLabsResponseInner object