public function getKnownUnworkablesUpdateSingle($entity, $key)
{
$result = parent::getKnownUnworkablesUpdateSingle($entity, $key);
$extras = array('HRAbsencePeriod' => array('cant_update' => array('start_date', 'end_date')));
if (isset($extras[$entity][$key])) {
return array_merge($result, $extras[$entity][$key]);
} else {
return $result;
}
}