🔧

vendor/symfony/uid/Ulid.php

@@ -26,7 +26,7 @@ class Ulid extends AbstractUid implements TimeBasedUidInterface
     private static string $time = '';
     private static array $rand = [];
 
-    public function __construct(string $ulid = null)
+    public function __construct(?string $ulid = null)
     {
         if (null === $ulid) {
             $this->uid = static::generate();
@@ -148,7 +148,7 @@ class Ulid extends AbstractUid implements TimeBasedUidInterface
         return \DateTimeImmutable::createFromFormat('U.u', substr_replace($time, '.', -3, 0));
     }
 
-    public static function generate(\DateTimeInterface $time = null): string
+    public static function generate(?\DateTimeInterface $time = null): string
     {
         if (null === $mtime = $time) {
             $time = microtime(false);