symfony · javiereguiluz · Jan 7, 2023 · Jan 5, 2023
diff --git a/service_container/injection_types.rst b/service_container/injection_types.rst
@@ -116,15 +116,16 @@ by cloning the original service, this approach allows you to make a service immu

    // ...
    use Symfony\Component\Mailer\MailerInterface;
+    use Symfony\Contracts\Service\Attribute\Required;

    class NewsletterManager
    {
        private $mailer;

        /**
-         * @required
         * @return static
         */
+        #[Required]
        public function withMailer(MailerInterface $mailer): self
        {
            $new = clone $this;
@@ -220,14 +221,14 @@ that accepts the dependency::
    // src/Mail/NewsletterManager.php
    namespace App\Mail;

+    use Symfony\Contracts\Service\Attribute\Required;
+
    // ...
    class NewsletterManager
    {
        private $mailer;

-        /**
-         * @required
-         */
+        #[Required]
        public function setMailer(MailerInterface $mailer): void
        {
            $this->mailer = $mailer;