static int autoVMExit_visibleObjects() {
  int objectCount = 0;
  
  // Scan for windows

  Map unimportantWindows = cast vm_generalMap_get("unimportant windows");
  Window[] windowList = Window.getWindows();
  for (Window window : windowList) {
    if (window.isVisible() && !containsKey(unimportantWindows, window))
      ++objectCount;
  }

  // Scan for tray icons

  try {
    objectCount += SystemTray.getSystemTray().getTrayIcons().length;
  } catch (Throwable e) {
    // ignore
  }
  
  // Scan for JavaFX stages
  
  try {
    objectCount += l((L) call(_getClass("com.sun.javafx.robot.impl.FXRobotHelper"), "getStages"));
  } catch {
  }
  
  ret objectCount;
}