question: public Map < String , Object > finalizeOrderEntryPayment ( String checkOutPaymentId , BigDecimal amount , boolean singleUse , boolean append ) { Map < String , Object > result = ServiceUtil . returnSuccess ( ) ; if ( UtilValidate . isNotEmpty ( checkOutPaymentId ) ) { if ( ! append ) { cart . clearPayments ( ) ; } cart . addPaymentAmount ( checkOutPaymentId , amount , singleUse ) ; } return result ; }
target:  Sets the payment ID to use during the checkout process