code: function UnknownPacket(cmd, data) {
    if (!(this instanceof UnknownPacket))
      return new UnknownPacket(cmd, data);
  
    Packet.call(this);
  
    this.cmd = cmd;
    this.data = data;
  }
docs: Represents an unknown packet.
  @constructor
  @param {String|null} cmd
  @param {Buffer|null} data
  @property {String} cmd
  @property {Buffer} data