code: function(friendnum, filenum, control) {
    this.type = 'FileRecvControlEvent';
    this._friendnum = friendnum;
    this._filenum = filenum;
    this._control = control;
  }
docs: Event object fired by {@class Tox}.
  Corresponds to tox_callback_file_recv_control(3).
  @class
  @param {Number} friendnum - Friend number
  @param {Number} filenum - File number
  @param {Number} control - TOX_FILE_CONTROL type