public function init()
{
$this->action_type_map = array();
foreach (self::$base_action_types as $action => $type) {
$this->action_type_map[strtolower($action)] = $type;
}
foreach (static::$action_types as $action => $type) {
$this->action_type_map[strtolower($action)] = $type;
}
return parent::init();
}