37    use LegacyEnumShimTrait;
 
   42    public static function fromString(
string $name) : ?
self{
 
   47        static $aliasMap = 
null;
 
   49        if($aliasMap === 
null){
 
   51            foreach(self::cases() as $case){
 
   52                foreach($case->getAliases() as $alias){
 
   53                    $aliasMap[$alias] = $case;
 
   57        return $aliasMap[mb_strtolower($name)] ?? 
null;
 
   64    public function getAliases() : array{
 
   66            self::STARTUP => [
"startup"],
 
   67            self::POSTWORLD => [
"postworld"]