package Ġcom . robert . b any ai . w up . data . clients Ċ Ċ import Ġcom . robert . b any ai . w up . data . model . Cards Response Ċ import Ġio . reactivex . rx java 3 . core . Single Ċ Ċ interface ĠRest Client Ġ{ ĊĠĠĠ Ġfun Ġfetch Cards (): ĠSingle < Cards Response > Ċ }