package Ġcom . ti are bal bi . arch unit . repositories Ċ Ċ import Ġcom . ti are bal bi . arch unit . models . Demo Ċ import Ġorg . springframework . data . jpa . repository . Jpa Repository Ċ import Ġorg . springframework . stereotype . Repository Ċ Ċ @ Repository Ċ interface ĠDemo Repository Ġ: ĠJ pa Repository < Demo , ĠLong > Ġ{ ĊĠĠĠ Ġfun Ġexists ByName ( name : ĠString ): ĠBoolean Ċ } Ċ