@NotNull
  TBItemScrubber addScrubber() {
    final int defaultScrubberWidth = 500;
    @NotNull TBItemScrubber scrub = new TBItemScrubber(myItemListener, myStats, defaultScrubberWidth);
    myItems.addItem(scrub);
    return scrub;
  }
@NotNull
  TBItemScrubber addScrubber()