package Ġcom . ing resse . design . helper Ċ Ċ import Ġjava . text . NumberFormat Ċ Ċ fun ĠDouble . to Currency (): ĠString Ġ{ ĊĠĠĠ Ġval Ġformatter Ġ= ĠNumber Format . getC urrency Instance () ĊĠĠĠ Ġreturn Ġformatter . format ( this ) Ċ }