public void cropTo(int fromItem, int toItem) {
        fromItem = Math.max(fromItem, 0);
        toItem = Math.min(toItem, cells.size());
        cells.forget(0, fromItem);
        cells.forget(toItem, cells.size());
    }
public void cropTo ( int fromItem , int toItem ) { fromItem = Math . max ( fromItem , 0 ) ; toItem = Math . min ( toItem , cells . size ( ) ) ; cells . forget ( 0 , fromItem ) ; cells . forget ( toItem , cells . size ( ) ) ; }
Updates the list of cells to display

@param fromItem the index of the first item to display
@param toItem the index of the last item to display