@Override
  public @Nullable FileModifier getFileModifierForPreview(@NotNull PsiFile target) {
    List<PyExpression> copies = new ArrayList<>();
    for (SmartPsiElementPointer<PyExpression> element : myProblemElements) {
      PyExpression copy = PyRefactoringUtil.findSameElementForPreview(element, target);
      if (copy == null) return null;
      copies.add(copy);
    }
    return new RemoveArgumentEqualDefaultQuickFix(copies);
  }
@Override
  public @Nullable FileModifier getFileModifierForPreview(@NotNull PsiFile target)