Helper::isNotValidSyncTokenError

public function isNotValidSyncTokenError(string $errorText = null): bool
{
	return !empty($errorText)
		&& (preg_match("/^([410] The requested minimum modification time lies too far in the past.)/i", $errorText)
		|| preg_match("/^([410] Sync token is no longer valid, a full sync is required.)/i", $errorText))
	;
}