}
    private static function computeHasCustomFieldSerializer(Clazz $instanceType)
    {
        assert($instanceType != null);
        $qualifiedTypeName = $instanceType->getName();
        $simpleSerializerName = $qualifiedTypeName . '_CustomFieldSerializer';
        $customSerializer = self::getCustomFieldSerializer($simpleSerializerName);
        if ($customSerializer != null) {
            return $customSerializer;
        }
        $customSerializerClass = self::getCustomFieldSerializer(self::JRE_SERIALIZER_PACKAGE . '.' . $simpleSerializerName);
        if (!is_null($customSerializerClass)) {
            return $customSerializerClass;
        }
        return null;
    }
    private static function getCustomFieldSerializer($qualifiedSerializerName)
    {
        try {
            return Classes::classOf($qualifiedSerializerName);
        } catch (ClassNotFoundException $e) {
            return null;
        }
    }
    public static function fieldComparator(Field $f1, Field $f2)
    {
        return strcmp($f1->getName(), $f2->getName());
    }
}
SerializabilityUtil::init();