private static boolean hasSafeType(PsiField field) {
    PsiType type = field.getType().getDeepComponentType();
    if (type instanceof PsiPrimitiveType) return true;
    if (!(type instanceof PsiClassType)) return false;
    PsiClass fieldClass = ((PsiClassType)type).resolve();
    if (fieldClass == null) return true;
    if (fieldClass.isEnum()) return true;
    if (fieldClass.hasAnnotation(FileModifier.SafeTypeForPreview.class.getCanonicalName())) return true;
    String name = fieldClass.getQualifiedName();
    return name != null && ALLOWED_FIELD_TYPES.contains(name);
  }
private static boolean hasSafeType(PsiField field)