asclass DMPopOutHandler {
  transient DynModule module;
  transient JButton popDownButton;
  
  abstract void addControl(JComponent c);
  
  void start {
    module = dm_current_mandatory();
    dm_vmBus_onMessages_q(ll("modulePoppedOut", "modulePoppedIn"), (m, myFrame) -> {
      if (dm_isMe(m))
        adjustUIForPoppedOutWindow();
    });
  }
  
  void adjustUIForPoppedOutWindow swing {
    if (popDownButton == null) {
      Window window = cast getWindow(dm_vis());

      var popBackInButton = findButton(window, "Pop Back In");
      var parent = getParent(popBackInButton);
      print(+parent);
      
      removeFromParent(parent); // hide controls
      
      popDownButton = jPopDownButton_noText(
        "Pop Back In", r { dm_popInModule(module) },
        jCheckBoxMenuItem("Always On Top",
          isAlwaysOnTop(window),
          r { temp module.enter(); dm_toggleAlwaysOnTop(); }),
      );
      addControl(popDownButton);      
    }
  }
}