void UpdateAutoDirection(Directionality aDir)
 {
   mElements.EnumerateEntries(SetNodeDirection, &aDir);
 }
 void ResetAutoDirection(nsINode* aTextNode, nsINode* aStartAfterNode)
 {
   mElements.EnumerateEntries(ResetNodeDirection, aStartAfterNode);
 }
 void ResetAutoDirection()
 {
   mElements.EnumerateEntries(ResetNodeDirection, nullptr);
 }