code: public Observable<Void> beginImportImageAsync(String resourceGroupName, String registryName, ImportImageParameters parameters) {
          return beginImportImageWithServiceResponseAsync(resourceGroupName, registryName, parameters).map(new Func1<ServiceResponse<Void>, Void>() {
              @Override
              public Void call(ServiceResponse<Void> response) {
                  return response.body();
              }
          });
      }
docs: Copies an image to this container registry from the specified container registry.
  
  @param resourceGroupName The name of the resource group to which the container registry belongs.
  @param registryName The name of the container registry.
  @param parameters The parameters specifying the image to copy and the source container registry.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceResponse} object if successful.