Term.prototype.update = function(newValue, options) {
  var self = this;
  if (self._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];}