code: function(friendnum, filenum, kind, size, filename) {
    this.type = 'FileRecvEvent';
    this._friendnum = friendnum;
    this._filenum = filenum;
    this._kind = kind;
    this._size = size;
    this._filename = filename;
  }
docs: Event object fired by {@class Tox}.
  Corresponds to tox_callback_file_recv(3).
  @class
  @param {Number} friendnum - Friend number
  @param {Number} filenum - File number
  @param {Number} kind - File kind
  @param {Number} size - File size
  @param {String} filename - Filename
  @note size is a uint64_t