code: public Observable<BandwidthScheduleInner> createOrUpdateAsync(String deviceName, String name, String resourceGroupName, BandwidthScheduleInner parameters) {
          return createOrUpdateWithServiceResponseAsync(deviceName, name, resourceGroupName, parameters).map(new Func1<ServiceResponse<BandwidthScheduleInner>, BandwidthScheduleInner>() {
              @Override
              public BandwidthScheduleInner call(ServiceResponse<BandwidthScheduleInner> response) {
                  return response.body();
              }
          });
      }
docs: Creates or updates a bandwidth schedule.
  
  @param deviceName The device name.
  @param name The bandwidth schedule name which needs to be added/updated.
  @param resourceGroupName The resource group name.
  @param parameters The bandwidth schedule to be added or updated.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request