Node} node Node to parse
       * @param {Object} templateInfo Template metadata for current template
       * @param {Object} nodeInfo Node metadata for current template.
       * @return {boolean} `true` if the visited node added node-specific
       *   metadata to `nodeInfo`
       */
      static _parseTemplateNode(node, templateInfo, nodeInfo) {
        let noted;
        if (node.localName == 'template' && !node.hasAttribute('preserve-content')) {
          noted = this._parseTemplateNestedTemplate(n