kahlan\matcher\ToReceive::_watch PHP Method

    protected function _watch($message)
    {
        $reference = $message->reference();
        if (!$reference) {
            Suite::register($message->name());
            return $message;
        }
        if (is_object($reference)) {
            Suite::register(get_class($reference));
        }
        Suite::register(Suite::hash($reference));
        return $message;
    }