static extern void _googleMapsViewSetOnMarkerInfoWindowClickListener(Callbacks.OnItemClickedDelegate callback, IntPtr callbackActionPtr);
static extern void _googleMapsViewSetOnCircleClickListener(Callbacks.OnItemClickedDelegate callback, IntPtr callbackActionPtr);
static extern void _googleMapsViewSetOnMarkerClickListener(Callbacks.OnItemClickedDelegate callback, IntPtr callbackActionPtr, bool defaultClickBehaviour);