private PsiField @NotNull [] calcFields() {
    List<PsiField> own = myClass.getOwnFields();
    List<PsiField> ext = internMembers(PsiAugmentProvider.collectAugments(myClass, PsiField.class, null));
    return ArrayUtil.mergeCollections(own, ext, PsiField.ARRAY_FACTORY);
  }
private PsiField @NotNull [] calcFields()