docs: function(opts) {
      var opts = opts || {};
      this._template = !!(opts.hasOwnProperty('template') ? opts.template : this.template);
      this._treeRemoval = !!(opts.hasOwnProperty('treeRemoval') ? opts.treeRemoval : this.treeRemoval);
      this._varsRemoval = !!(opts.hasOwnProperty('varsRemoval') ? opts.varsRemoval : this.varsRemoval);
      this._parseNode(this.ast);
      return this;
    }