package Ġcom . sed software . y apt alk er . domain . repository Ċ Ċ import Ġcom . sed software . y apt alk er . domain . entity . Base Entity Ċ import Ġio . reactivex . Single Ċ Ċ interface ĠActive Topics Repository Ġ{ ĊĠĠĠ Ġfun Ġget Active Topics ( hash : ĠString , Ġpage : ĠInt ): ĠSingle < List < Base Entity >> ĊĠĠĠ Ġfun Ġget Black listed Topic Ids (): ĠSingle < Set < Int >> Ċ } Ċ