Calendar::getSpecificMassiveActions PHP Method

    function getSpecificMassiveActions($checkitem = NULL)
    {
        $isadmin = static::canUpdate();
        $actions = parent::getSpecificMassiveActions($checkitem);
        if ($isadmin) {
            $actions[__CLASS__ . MassiveAction::CLASS_ACTION_SEPARATOR . 'duplicate'] = _x('button', 'Duplicate');
            $actions[__CLASS__ . MassiveAction::CLASS_ACTION_SEPARATOR . 'addholiday'] = __('Add a close time');
        }
        return $actions;
    }