code: function buildNav(members) {
      var links = {'': []};
  
      members.namespaces.forEach(function(item) {
        links[item.longname || item.name] = [];
      });
  
      addItem(links, members.modules, 'Modules', linkto);
      addItem(links, members.externals, 'Externals', linktoExternal);
      addItem(links, members.classes, 'Classes', linkto);
      addItem(links, members.events, 'Events', linkto);
      addItem(links, members.mixins, 'Mixins', linkto);
      addItem(links, members.tutorials, 'Tutorials', {}, linktoTutorial);
      addItem(links, members.interfaces, 'Interfaces', linkto);
  
      return links;
  }
docs: Create the navigation sidebar.
  @param {object} members The members that will be used to create the sidebar.
  @param {array<object>} members.classes
  @param {array<object>} members.externals
  @param {array<object>} members.globals
  @param {array<object>} members.mixins
  @param {array<object>} members.modules
  @param {array<object>} members.namespaces
  @param {array<object>} members.tutorials
  @param {array<object>} members.events
  @param {array<object>} members.interfaces
  @return {string} The HTML for the navigation sidebar.