@Override
  protected @NotNull List<String> getNullablesWithNickNames() {
    return CachedValuesManager.getManager(myProject).getCachedValue(myProject, () ->
      Result.create(StreamEx.of(getNullables(), filterNickNames(Nullability.NULLABLE)).toFlatList(Function.identity()),
                                        PsiModificationTracker.MODIFICATION_COUNT));
  }
@Override
  protected @NotNull List<String> getNullablesWithNickNames()