code: function toggleHamMenu(show) {
          if (!$nbmBtn) return;
          var fn = show ? 'addClass' : 'removeClass';
          $nbmBtn[fn]('toggled');
          $navOverlay[fn]('toggled'); // toggle overlay / backdrop
          $navbarMenu[fn]('toggled');
          // disable body scroll if menu is open
          helper.toggleBodyScroll(!show);
  
          if (show) {
              // scroll the contents of the responsive collapsed navbar menu to
              // top.
              $navbarMenu.scrollTop(0);
              // if showing responsive collapsed navbar menu, we'll close the
              // sidebar.
              if ($sidebarWrapper && $sidebarWrapper.length) {
                  $wrapper.removeClass('toggled');
                  $sidebarToggle.removeClass('toggled');
                  // also hide the sidebar toggler, so user cannot re-open it
                  // while navbar menu is shown. we use opacity instead of
                  // display:none bec, it's used by a media query in sidebar.less
                  // (the toggler is already hidden in small screens).
                  $sidebarToggle.css('opacity', 0);
              }
          } else {
              // show sidebar toggler if responsive collapsed navbar menu is
              // closed.
              $sidebarToggle.css('opacity', 1);
          }
      }
docs: Toggles the hamburger menu for the navbar list.
  @private
  @param {Boolean} show -