docs: public int getCloseCode()
      {
          if (mPayload == null || mPayload.length < 2)
          {
              return WebSocketCloseCode.NONE;
          }
  
          // A close code is encoded in network byte order.
          int closeCode = (((mPayload[0] & 0xFF) << 8) | (mPayload[1] & 0xFF));
  
          return closeCode;
      }