@Override
      public Result<XmlElementDescriptor> compute() {
        XmlElementDescriptor descriptor =
          RecursionManager.doPreventingRecursion(myTag, true, XmlTagDelegate.this::computeElementDescriptor);
        return Result.create(descriptor, PsiModificationTracker.MODIFICATION_COUNT, externalResourceModificationTracker(myTag));
      }
@Override
      public Result<XmlElementDescriptor> compute()