please include function myFrames.

// can probably be merged with next variant
static void disposeWindow(final Window window) {
  if (window != null) swing {
    window.dispatchEvent(new WindowEvent(window, WindowEvent.WINDOW_CLOSING)); // call listeners
    myFrames_list.remove(window);
    window.dispose();
  }
}

static void disposeWindow(final Component c) {
  disposeWindow(getWindow(c));
}

static void disposeWindow(O o) {
  if (o != null) disposeWindow(o/Component);
}

static void disposeWindow() {
  disposeWindow(heldInstance(Component));
}

Began life as a copy of #1003377