BaseService::getRestCodeFromConfig

static function getRestCodeFromConfig(array $config): string
{
	$handlerCode = '';

	foreach ($config as $configItem)
	{
		if (!empty($configItem['REST_CODE']))
		{
			$handlerCode = (string)$configItem['REST_CODE'];
			break;
		}
	}

	return $handlerCode;
}