CalendarEntryAjax::getBusyUsersIds

private function getBusyUsersIds(array $attendees, int $curEventId, int $fromTs, int $toTs): array
{
	$usersToCheck = $this->getUsersToCheck($attendees);
	if (empty($usersToCheck))
	{
		return [];
	}

	return (new Accessibility())
		->setCheckPermissions(false)
		->setSkipEventId($curEventId)
		->getBusyUsersIds($usersToCheck, $fromTs, $toTs);
}