Message::loadByExternalId

static function loadByExternalId(string $senderId, string $externalId, ?string $from = null): ?Message
{
	$fields = MessageTable::getByExternalId($senderId, $externalId, $from)->fetch();
	if (!$fields)
	{
		return null;
	}
	$instance = new static();
	$instance->setFields($fields);

	return $instance;
}