static Rect boundsInParent(final Component _c, final Class parentType) {
  if (_c == null) null;
  ret swing(func -> Rect {
    Rect r = toRect(_c.getBounds());
    Component c = _c;
    while true {
      c = c.getParent();
      if (c == null) null;
      if (isInstance(parentType, c)) ret r;
      r = translateRect(r, c.getX(), c.getY());
    }
  });
}