@Nullable
  public static PsiElement treeWalkUp(final XmlProcessor processor, PsiElement elt) {
    if (elt == null) return null;

    PsiElement cur = elt;
    do {
      if (cur instanceof XmlTag tag) {
        if (!processor.process(tag)) {
          if (processor instanceof ResolveProcessor) {
            return ((ResolveProcessor)processor).getResult();
          }
          return null;
        }
      }

      if (cur instanceof PsiFile) break;
      cur = PsiTreeUtil.getPrevSiblingOfType(cur, XmlTag.class);
    }
    while (cur != null);

    return treeWalkUp(processor, elt.getContext());
  }
@Nullable
  public static PsiElement treeWalkUp(final XmlProcessor processor, PsiElement elt)