Sender::send

static function send(int $userId, Message $message, ?array $channels = null): Result
{
	$result = new Result();

	if ($channels === null)
	{
		$channels = [
			new ApplicationChannel(),
		];
	}

	foreach ($channels as $channel)
	{
		$r = $channel->send($userId, $message);
		$result->addErrors($r->getErrors());
	}

	return $result;
}