code: protected void clearBubbles (boolean all)
      {
          for (Iterator<BubbleGlyph> iter = _bubbles.iterator(); iter.hasNext();) {
              ChatGlyph rec = iter.next();
              if (all || isPlaceOrientedType(rec.getType())) {
                  _target.abortAnimation(rec);
                  iter.remove();
              }
          }
      }
docs: Clear chat bubbles, either all of them or just the place-oriented ones.