code: public static void sendPongBlocking(final PooledByteBuffer pooledData, final WebSocketChannel wsChannel) throws IOException {
          sendBlockingInternal(pooledData, WebSocketFrameType.PONG, wsChannel);
      }
docs: Sends a complete pong message using blocking IO
  Automatically frees the pooled byte buffer when done.
  
  @param pooledData The data to send, it will be freed when done
  @param wsChannel The web socket channel