code: function buildNav(members) {
      var nav = '<h2><a href="index.html">Home</a></h2>';
      var seen = {};
      var seenTutorials = {};
      
      nav += buildMemberNav(members.actions, 'Actions', seen, linktoLong);
      nav += buildMemberNav(members.filters, 'Filters', seen, linktoLong);
      nav += buildMemberNav(members.tutorials, 'Tutorials', seenTutorials, linktoTutorial);
  
      return nav;
  }
docs: Create the navigation sidebar.
  @param {object} members The members that will be used to create the sidebar.
  @param {array<object>} members.actions
  @param {array<object>} members.filters
  @param {array<object>} members.tutorials
  @return {string} The HTML for the navigation sidebar.