question: private void applyAndAnimateAdditions ( List < T > from , List < T > newItems ) { hashItems = new HashSet < > ( from ) ; int in = 0 ; for ( int i = 0 ; i < newItems . size ( ) ; i ++ ) { if ( mFilterAsyncTask != null && mFilterAsyncTask . isCancelled ( ) ) return ; final T item = newItems . get ( i ) ; if ( ! hashItems . contains ( item ) ) { if ( notifyMoveOfFilteredItems ) { from . add ( item ) ; notifications . add ( new Notification ( from . size ( ) , Notification . ADD ) ) ; } else { from . add ( i , item ) ; notifications . add ( new Notification ( i , Notification . ADD ) ) ; } in ++ ; } } hashItems = null ; if ( DEBUG ) Log . v ( TAG , "calculateAdditions total new=" + in ) ; }
target:  Find out all added items and animate them.