public void add(Chip chip){
  if (!mChipList.contains(chip) || mToleratingDuplicate) {
    mChipList.add(chip);
    notifyUpdate();
  }
}

public void add ( Chip chip ) { if ( ! mChipList . contains ( chip ) || mToleratingDuplicate ) { mChipList . add ( chip ) ; notifyUpdate ( ) ; } }
wrapper to add a chip
