private static boolean isUniqueAttrValueAmongSiblings(XmlTag tag, String name, String value) {
      var parent = tag.getParent();
      var siblings = parent.getChildren();
      for (PsiElement sibling : siblings) {
        if (sibling instanceof XmlTag siblingTag && siblingTag != tag) {
          if (value.equalsIgnoreCase(siblingTag.getAttributeValue(name))) {
            return false;
          }
        }
      }
      return true;
    }
private static boolean isUniqueAttrValueAmongSiblings(XmlTag tag, String name, String value)