# group_by=(\'parent_uid\', ), # The limit is not applied on the number of payment transactions, but on the number of lines (to simplify setting aggregate relation).\n
\n
# For better performance, add \'payment_transaction_group_aggregate_uid\' column in stock table\n
# and use payment_transaction_group_aggregate_uid=None here\n
<value><string>python: context.getValidationState() == \'open\' and \'PaymentTransactionGroup_getGroupablePaymentTransactionLineList\' or \'PaymentTransactionGroup_getGroupedPaymentTransactionLineList\'</string></value>