is::getDepartmentsUsersIds

static function getDepartmentsUsersIds($departmentsIds, $withFired = false)
{
	$res = static::getByDepartments($departmentsIds, ['ID', 'UF_DEPARTMENT'], $withFired);

	if (!$res)
	{
		return [];
	}

	$list = [];
	foreach ($res as $item)
	{
		$list[] = $item['ID'];
	}

	return $list;
}