# XXX: Doesn't work.
#if (isset($state_mask)) $q->useOrderStateQuery()->addSelectQuery($latest_state, 'latestState')->where("order_id=latestState.order_id")->where("state & $state_mask")->endUse();
if (isset($state_mask)) $q->filterById($order_ids);
# XXX: Doesn't work.
#if (isset($state_mask)) $q->useOrderStateQuery()->addSelectQuery($latest_state, 'latestState')->where("order_id=latestState.order_id")->where("state & $state_mask")->endUse();
if (isset($state_mask)) $q->filterById($order_ids);