@Nullable
  private static String getOldQName(PsiElement element) {
    if (element instanceof PsiClass) {
      return ((PsiClass)element).getQualifiedName();
    }
    else if (element instanceof PsiPackage) {
      return ((PsiPackage)element).getQualifiedName();
    }
    else if (element instanceof PsiClassOwner) {
      return ((PsiClassOwner)element).getName();
    }
    else {
      LOG.error("unknown element: " + element);
      return null;
    }
  }
@Nullable
  private static String getOldQName(PsiElement element)