docs: function () {
        var history = _emberMetalProperty_get.get(this, 'history') || window.history;
        _emberMetalProperty_set.set(this, 'history', history);
  
        if (history && 'state' in history) {
          this.supportsHistory = true;
        }
  
        this.replaceState(this.formatURL(this.getURL()));
      }