package Ġlibrary . service . business . books . exceptions Ċ Ċ import Ġlibrary . service . business . books . domain . types . Book Id Ċ import Ġlibrary . service . business . exceptions . Not Possible Exception Ċ Ċ class ĠBook Already Returned Exception ( id : ĠBook Id ) ĊĠĠĠ Ġ: ĠNot Possible Exception (" The Ġbook Ġwith ĠID : Ġ$ id Ġwas Ġalready Ġreturned !")