question: add a new creditor and the corresponding debitors . concode_field_sep int memberCountCache concode_elem_sep List<BillMember> creditors concode_elem_sep List<List<BillMember>> debitorLists concode_field_sep int getMemberCount concode_elem_sep List<Payment> extractPayments concode_elem_sep double getSum concode_elem_sep List<Payment> createPayments
target: void function ( BillMember arg0 , List < BillMember > arg1 ) { creditors . add ( arg0 ) ; debitorLists . add ( arg1 ) ; }