Default fowarding fix trap

gistfile1.js

  // Object.{freeze|seal|preventExtensions}(proxy) -> proxy
  fix: function() {
    // As long as target is not frozen, the proxy won't allow itself to be fixed
    if (!Object.isFrozen(this.target))
      return undefined;
    var props = {};
    var handler = this;
    Object.getOwnPropertyNames(this.target).forEach(function (name) {
      var desc = Object.getOwnPropertyDescriptor(this.target, name);
      // turn descriptor into a trapping accessor property
      props[name] = {
                get: function( ) { return handler.get(this, name); },
                set: function(v) { return handler.set(this, name, v); },
         enumerable: desc.enumerable,
       configurable: desc.configurable
      };
    });
    return props;
  }