Order::isDocumentExists

static function isDocumentExists($documentId): bool
{
	$documentInfo = static::GetDocumentInfo($documentId);
	if (empty($documentInfo))
	{
		return false;
	}

	$dbRes = Crm\Order\Order::getList([
		'select' => ['ID'],
		'filter' => ['=ID' => $documentInfo['ID']]
	]);

	return is_array($dbRes->fetch());
}