private void processEntry(@Nullable XmlElementArrangementEntry entry, @Nullable PsiElement nextElement) {
    if (entry == null || nextElement == null) {
      return;
    }
    myStack.push(entry);
    try {
      nextElement.acceptChildren(this);
    }
    finally {
      myStack.pop();
    }
  }
private void processEntry(@Nullable XmlElementArrangementEntry entry, @Nullable PsiElement nextElement)