CIntranetUtils::getSubDepartments

static function getSubDepartments($departmentId = 0)
{
	if (self::$SECTIONS_SETTINGS_CACHE === null)
		self::_GetDeparmentsTree();

	if (isset(self::$SECTIONS_SETTINGS_CACHE['TREE'][$departmentId]))
		$arDepartmentsIdentifiers = self::$SECTIONS_SETTINGS_CACHE['TREE'][$departmentId];
	else
		$arDepartmentsIdentifiers = null;

	return ($arDepartmentsIdentifiers);
}