ServiceFactory::getEnginePool

static function getEnginePool() : array
{
	if(!static::$enginePool)
	{
		static::$enginePool = [];
		foreach (self::getServices() as $service)
		{
			foreach ($service::getTypes() as $type)
			{
				static::$enginePool[$service::getEngineCode($type)] = $service;
			}
		}
	}
	return static::$enginePool;
}