dedLocalNames
         * @type string
         * @default ''
         */
        excludedLocalNames: ''

      },

      closeAction: function() {
        this.opened = false;
      },

      /**
       * Toggle the opened state of the dropdown.
       * @method toggle
       */
      toggle: function() {
        this.opened = !this.opened;
      },

      /**
       * The selected menu item.
       * @property selection
       * @type Node
       */
      get selection() {
        return this.$.menu.select