@Override
  public @Nullable FileModifier getFileModifierForPreview(@NotNull PsiFile target) {
    GrReferenceExpression expr = getRefExpr();
    if (expr == null) {
      return null;
    }
    return new CreateSetterFromUsageFix(expr);
  }
@Override
  public @Nullable FileModifier getFileModifierForPreview(@NotNull PsiFile target)