private static void registerIncreaseLevelFixes(@NotNull PsiJavaCodeReferenceElement ref,
                                                 @NotNull JavaFeature feature,
                                                 @NotNull QuickFixActionRegistrar registrar) {
    List<IntentionAction> fixes = new ArrayList<>();
    HighlightUtil.registerIncreaseLanguageLevelFixes(ref, feature, fixes);
    for (IntentionAction fix : fixes) {
      registrar.register(fix);
    }
  }
private static void registerIncreaseLevelFixes(@NotNull PsiJavaCodeReferenceElement ref,
                                                 @NotNull JavaFeature feature,
                                                 @NotNull QuickFixActionRegistrar registrar)