$getProperty method

Implementation

@override
$Value? $getProperty(Runtime runtime, String identifier) {
  switch (identifier) {
    case 'addListener':
      return $Function((runtime, target, args) {
        final listener = args[0] as EvalCallable;
        void fn() => listener.call(runtime, null, []);
        _$listenerCache[listener] = fn;
        (target!.$value as Listenable).addListener(fn);
        return null;
      });
    case 'removeListener':
      return $Function((runtime, target, args) {
        (target!.$value as Listenable)
            .removeListener(_$listenerCache[args[0] as EvalCallable]!);
        return null;
      });
  }
  return _superclass.$getProperty(runtime, identifier);
}