getSenderFromAlias example

    public function __construct(array $sendersMap, ContainerInterface $sendersLocator)
    {
        $this->sendersMap = $sendersMap;
        $this->sendersLocator = $sendersLocator;
    }

    public function getSenders(Envelope $envelope): iterable
    {
        if ($envelope->all(TransportNamesStamp::class)) {
            foreach ($envelope->last(TransportNamesStamp::class)->getTransportNames() as $senderAlias) {
                yield from $this->getSenderFromAlias($senderAlias);
            }

            return;
        }

        $seen = [];

        foreach (HandlersLocator::listTypes($envelope) as $type) {
            foreach ($this->sendersMap[$type] ?? [] as $senderAlias) {
                if (str_ends_with($type, '*') && $seen) {
                    // the '*' acts as a fallback, if other senders already matched