package Ġdev . lo tr . domain . repository Ċ Ċ import Ġdev . lo tr . domain . model . Book Ċ import Ġdev . lo tr . domain . model . Chapter Ċ Ċ interface ĠBook And Chapter Repository Ġ{ ĊĠĠĠ Ġsuspend Ġfun Ġget Books (): ĠList < Book > ĊĠĠĠ Ġsuspend Ġfun Ġget Book Chapter s ( book Id : ĠString ): ĠList < Chapter > Ċ } Ċ