package Ġio . dot an uki . block ked . domain Ċ Ċ import Ġio . reactivex . Observable Ċ Ċ interface ĠFetch Bitcoin Statistic Ġ{ ĊĊĠĠĠ Ġfun Ġexecute ( target : ĠSupported Statistic , Ġstrategy : ĠFetch Strategy ): ĠObservable < Bitcoin Statistic > Ċ Ċ }