package Ġdigital . w up . super hero app . data . source Ċ Ċ import Ġdigital . w up . super hero app . domain . model . Character Ċ import Ġdigital . w up . super hero app . rx . Comp letable Ċ import Ġdigital . w up . super hero app . rx . Single Ċ Ċ interface ĠChar acters DataSource Ġ{ ĊĠĠĠ Ġfun Ġget Characters (): ĠSingle < List < Character >> ĊĊĠĠĠ Ġfun Ġget Character ById ( character Id : ĠString ): ĠSingle < Character > ĊĊĠĠĠ Ġfun Ġsave Characters ( characters : ĠList < Character >): ĠComp letable Ċ }