NoRecipient example

    public function __construct(array|ContainerInterface $channels, ChannelPolicyInterface $policy = null)
    {
        $this->channels = $channels;
        $this->policy = $policy;
    }

    public function send(Notification $notification, RecipientInterface ...$recipients): void
    {
        if (!$recipients) {
            $recipients = [new NoRecipient()];
        }

        foreach ($recipients as $recipient) {
            foreach ($this->getChannels($notification, $recipient) as $channel => $transportName) {
                $channel->notify($notification, $recipient, $transportName);
            }
        }
    }

    public function addAdminRecipient(RecipientInterface $recipient): void
    {