Changes

   MapPage mapPage = (MapPage) pages[menu.currentTab];

   MapPage mapPage = (MapPage) pages[menu.currentTab];

   // Two examples for checking if MapPage is open

   // Two examples of checking if MapPage is open

   pages[menu.currentTab] is MapPage  

   pages[menu.currentTab] is MapPage || menu.currentTab == GameMenu.mapTab;

  menu.currentTab == 3

}

}

</source>

</source>