package Ġbr . com . bre iv . payment . credit card . gate ways čĊč Ċ import Ġbr . com . bre iv . payment . Payment . CreditCard Payment čĊč Ċ interface ĠCredit Card Payment Repository Ġ{ čĊčĊĠĠĠ Ġfun Ġsave ( payment : ĠCredit Card Payment ): ĠCredit Card Payment čĊčĊĠĠĠ Ġfun ĠfindBy ( id : ĠLong ): ĠCredit Card Payment ? č Ċ }