package Ġcom . daniel b ost wick . stop watch . core . service Ċ Ċ import Ġcom . daniel b ost wick . stop watch . core . model . Stop watch Ċ import Ġorg . joda . time . DateTime Ċ import Ġorg . joda . time . Duration Ċ Ċ interface ĠStop watch Service Ġ{ ĊĠĠĠ Ġfun Ġcreate (): ĠStop watch ĊĠĠĠ Ġfun Ġstart ( stop watch : ĠStop watch , Ġstarted At : ĠDateTime ): ĠStop watch ĊĠĠĠ Ġfun Ġpause ( stop watch : ĠStop watch , Ġpaused At : ĠDateTime ): ĠStop watch ĊĠĠĠ Ġfun Ġreset ( stop watch : ĠStop watch ): ĠStop watch ĊĠĠĠ Ġfun Ġtime Elapsed ( stop watch : ĠStop watch , Ġnow : ĠDateTime ): ĠDuration Ċ } Ċ