package Ġcom . github . program m err 4 7 . currency calculator . util Ċ Ċ import Ġandroid . view . View Ċ import Ġandroidx . annotation . Id Res Ċ import Ġandroidx . recyclerview . widget . Diff Util Ċ import Ġandroidx . recyclerview . widget . RecyclerView Ċ Ċ fun Ġ< T Ġ: ĠView > ĠRecyclerView . ViewHolder . bind (@ Id Res Ġid : ĠInt ) Ġ= ĠitemView . findViewById < T >( id ) Ċ Ċ fun ĠRecyclerView . Adapter <* >. calculate Diff ( callback : ĠDiff Util . Callback ) Ġ= ĊĠĠĠĠĠĠĠ ĠDiff Util . calculate Diff ( callback ). dispatch Updates To ( this )