package Ġcom . architecture . business . weather . callback Ċ Ċ import Ġcom . architecture . business . core . callback . Base Present CallBack Ċ import Ġcom . architecture . business . core . exception . Business Exception Ċ Ċ interface ĠWeather CallBack < Weather Info > Ġ: ĠBase Present CallBack < Weather Info > Ġ{ ĊĠĠĠ Ġfun Ġon City NotFound ( exception : ĠBusiness Exception ) Ċ }