public static function validateInternalConflictingStrategy($conflictingInternalUrlStrategy)
    {
        if (!in_array($conflictingInternalUrlStrategy, [self::STRATEGY_IGNORE, self::STRATEGY_MOVE_PREVIOUS_TO_NEW, self::STRATEGY_MOVE_NEW_TO_PREVIOUS])) {
            throw new \InvalidArgumentException("Invalid \$conflictingInternalUrlStrategy '$conflictingInternalUrlStrategy'");
        }
    }