_attachToDom (domAnchor) {
    if (domAnchor.table) {
      if (domAnchor.nextTr) {
        domAnchor.table.insertBefore(this.getDom(), domAnchor.nextTr)
      } else {
        domAnchor.table.appendChild(this.getDom())
      }
    }

    if (this.expanded) {
      this.showChilds()
    }
  }
Attach this node to the DOM again
@param {{table: Element, nextTr?: Element}} domAnchor
           The DOM elements returned by _detachFromDom.
@private