package Ġcom . inst ac art . formula . android . internal Ċ Ċ import Ġcom . inst ac art . formula . android . Feature Event Ċ import Ġcom . inst ac art . formula . android . Fragment Id Ċ Ċ internal Ġinterface ĠFeature Provider Ġ{ ĊĠĠĠ Ġfun Ġget Feature ( id : ĠFragment Id ): ĠFeature Event ? Ċ }