code: function create(root) {
      var result = toc(root);
  
      var node = result.map;
  
      if(!node) return null;
  
      data(node, {
          class: ['vremark-toc']
      });
  
      return result.map;
  }
docs: var toString = require('mdast-util-to-string'); var slugger = require('../util/slugger'); var visitChildren = require('unist-util-visit-children');