ReadService::onAfterMessageSend

public function onAfterMessageSend(Message $message, RelationCollection $relations): Result
{
	$counters = $this
		->markMessageUnread($message, $relations)
		->markRecentUnread($message)
		->getCountersForUsers($message, $relations)
	;

	return (new Result())->setResult(['COUNTERS' => $counters]);
}