code: public Observable<Void> scaleAsync(String resourceGroupName, String accountName, String streamingEndpointName) {
          return scaleWithServiceResponseAsync(resourceGroupName, accountName, streamingEndpointName).map(new Func1<ServiceResponse<Void>, Void>() {
              @Override
              public Void call(ServiceResponse<Void> response) {
                  return response.body();
              }
          });
      }
docs: Scale StreamingEndpoint.
  Scales an existing StreamingEndpoint.
  
  @param resourceGroupName The name of the resource group within the Azure subscription.
  @param accountName The Media Services account name.
  @param streamingEndpointName The name of the StreamingEndpoint.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request