code: function() {
          this.fireEvent('hiding');
  
          this.container.removeClass('move-' + this.opposite);
  
          this.element
              .conceal()
              .removeClass('is-expanded')
              .aria('expanded', false);
  
          if (this.options.stopScroll) {
              $('body').removeClass('no-scroll');
          }
  
          this.fireEvent('hidden');
      }
docs: Hide the sidebar and reset the container.