docs: function dispatchShow_(element, detail) {
  
      /**
       * Dispatch show event if URL's fragment matches with a route
       *
       * @event MaterialRouter3#show
       * @type {CustomEvent}
       * @property {HTMLElement} router - The router that dispatches
       *   this event
       * @property {String} param1
       * @property {String} param2
       * @property {String} ...
       * @property {String} paramN - The values extracted
       *   from the URL's fragment. These params go in order of appearance
       *   from left to right.
       */
      element.dispatchEvent(new CustomEvent('show', {
        bubbles: true,
        detail: detail
      }));
    }