code: public Observable<Void> beginRefreshAsync(String deviceName, String name, String resourceGroupName) {
          return beginRefreshWithServiceResponseAsync(deviceName, name, resourceGroupName).map(new Func1<ServiceResponse<Void>, Void>() {
              @Override
              public Void call(ServiceResponse<Void> response) {
                  return response.body();
              }
          });
      }
docs: Refreshes the share metadata with the data from the cloud.
  
  @param deviceName The device name.
  @param name The share name.
  @param resourceGroupName The resource group name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceResponse} object if successful.