r.prototype.js = function(jsString, options) {
  if (Term.prototype._fastArityRange(arguments.length, 1, 2) === false) {
    var _len = arguments.length;var _args = new Array(_len); for (var _i = 0; _i < _len; _i++) {_args[_i] = arguments[_i];}
    Term.prototype._arityRange(_args, 1, 2, 'r.js', this);
  }