code: function () {
          var self = this, box;
  
          self.items().exec('postRender');
          self._super();
  
          self._layout.postRender(self);
          self.state.set('rendered', true);
  
          if (self.settings.style) {
            self.$el.css(self.settings.style);
          }
  
          if (self.settings.border) {
            box = self.borderBox;
            self.$el.css({
              'border-top-width': box.top,
              'border-right-width': box.right,
              'border-bottom-width': box.bottom,
              'border-left-width': box.left
            });
          }
  
          if (!self.parent()) {
            self.keyboardNav = new KeyboardNavigation({
              root: self
            });
          }
  
          return self;
        }
docs: Post render method. Called after the control has been rendered to the target.
  
  @method postRender
  @return {tinymce.ui.Container} Current combobox instance.