public static @Nullable Nullability getNickNamedNullability(@NotNull PsiClass psiClass) {
    PsiModifierList modifierList = psiClass.getModifierList();
    if (modifierList == null) return null;
    if (!modifierList.hasAnnotation(TYPE_QUALIFIER_NICKNAME)) return null;

    PsiAnnotation nonNull = modifierList.findAnnotation(JAVAX_ANNOTATION_NONNULL);
    if (nonNull != null) {
      return extractNullityFromWhenValue(nonNull);
    }
    if (modifierList.hasAnnotation(JAVAX_ANNOTATION_CHECK_FOR_NULL)) {
      return Nullability.NULLABLE;
    }
    return null;
  }
public static @Nullable Nullability getNickNamedNullability(@NotNull PsiClass psiClass)