protected static void applyFix(@NotNull final Project project, @NotNull final PsiElement tag) {
    final ASTNode child = XmlChildRole.START_TAG_END_FINDER.findChild(tag.getNode());
    if (child == null) return;
    final int offset = child.getTextRange().getStartOffset();
    final Document document = tag.getContainingFile().getViewProvider().getDocument();
    assert document != null;
    document.replaceString(offset, tag.getTextRange().getEndOffset(), "/>");
    SmartPsiElementPointer<PsiElement> pointer = SmartPointerManager.getInstance(project).createSmartPsiElementPointer(tag);
    PsiDocumentManager.getInstance(project).commitDocument(document);
    PsiElement restored = pointer.getElement();
    if (restored != null) {
      CodeStyleManager.getInstance(project).reformat(restored);
    }
  }
protected static void applyFix(@NotNull final Project project, @NotNull final PsiElement tag)