code: public void removeSprites (Predicate<Sprite> pred)
      {
          int idxoff = 0;
          for (int ii = 0, ll = _sprites.size(); ii < ll; ii++) {
              Sprite sprite = _sprites.get(ii-idxoff);
              if (pred.apply(sprite)) {
                  _sprites.remove(sprite);
                  sprite.invalidate();
                  sprite.shutdown();
                  // we need to preserve the original "index" relative to the current tick position,
                  // so we don't decrement ii directly
                  idxoff++;
                  if (ii <= _tickpos) {
                      _tickpos--;
                  }
              }
          }
      }
docs: Removes all sprites that match the supplied predicate.