@Override
  public Handle moveHandle(HandleGesture gesture) {
    final var hs = getHandles(gesture);
    final var is = new Handle[hs.size()];
    Handle ret = null;
    var i = -1;
    for (final var h : hs) {
      i++;
      is[i] = h;
    }
    setHandles(is);
    return ret;
  }