code: public Observable<DataBoxEdgeDeviceInner> updateAsync(String deviceName, String resourceGroupName, Map<String, String> tags) {
          return updateWithServiceResponseAsync(deviceName, resourceGroupName, tags).map(new Func1<ServiceResponse<DataBoxEdgeDeviceInner>, DataBoxEdgeDeviceInner>() {
              @Override
              public DataBoxEdgeDeviceInner call(ServiceResponse<DataBoxEdgeDeviceInner> response) {
                  return response.body();
              }
          });
      }
docs: Modifies a Data Box Edge/Gateway resource.
  
  @param deviceName The device name.
  @param resourceGroupName The resource group name.
  @param tags The tags attached to the Data Box Edge/Gateway resource.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the DataBoxEdgeDeviceInner object