code: function () {
              var leaf;
              if (this._branch.length) {
                  leaf = this._branch[this._branch.length - 1];
                  if (!leaf.hasContent) {
                      this._buffer.push(">");
                      leaf.hasContent = true;
                  }
              }
          }
docs: Close the current tag (if opened) in order to put content in it
  
  @private