OrmConverter::buildConfigString

private function buildConfigString(?Config $config)
{
	if (is_null($config))
	{
		return '';
	}

	$configArray = [];
	/** @var ConfigItem $configItem */
	foreach ($config as $configItem)
	{
		$configArray[] = $this->convertConfigItemToArray($configItem);
	}

	return serialize($configArray);
}