private function markTransactionsAsPaid(Pap_Common_Payout $payout) {
     $update = new Gpf_SqlBuilder_UpdateBuilder();
     $update->set->add(Pap_Db_Table_Transactions::PAYOUT_STATUS, Pap_Common_Transaction::PAYOUT_PAID);
     $update->set->add(Pap_Db_Table_Transactions::PAYOUTHISTORY_ID, $payout->getPayoutHistoryId());
     $update->from->add(Pap_Db_Table_Transactions::getName());
     $update->where->add(Pap_Db_Table_Transactions::USER_ID, "=", $payout->getUserId());
     $update->where->add(Pap_Db_Table_Transactions::PAYOUTHISTORY_ID, '=', Pap_Common_Transaction::PAYMENT_PENDING_ID);
     $update->execute();
 }