package Ġcom . code hang outs . news feed . data . local . db Ċ Ċ import Ġandroidx . lifecycle . LiveData Ċ import Ġcom . code hang outs . news feed . data . model . db . Article Ċ import Ġcom . code hang outs . news feed . data . model . Result Ċ Ċ interface ĠDb DataSource Ġ{ ĊĠĠĠ Ġsuspend Ġfun Ġinsert Article ( article : ĠArticle ) ĊĠĠĠ Ġsuspend Ġfun Ġdelete Article ( article : ĠArticle ) ĊĠĠĠ Ġsuspend Ġfun Ġfind ById ( id : ĠLong ): ĠResult < Article > ĊĠĠĠ Ġfun Ġall Articles (): ĠLive Data < List < Article >> Ċ }