Document_Item::getRelationMassiveActionsPeerForSubForm PHP Method

    static function getRelationMassiveActionsPeerForSubForm(MassiveAction $ma)
    {
        switch ($ma->getAction()) {
            case 'add':
            case 'remove':
                return 1;
            case 'add_item':
            case 'remove_item':
                return 2;
        }
        return 0;
    }