void ToggleLivePhotoMode (UIButton livePhotoModeButton)
{
sessionQueue.DispatchAsync (() => {
livePhotoMode = (livePhotoMode == LivePhotoMode.On) ? LivePhotoMode.Off : LivePhotoMode.On;
var mode = livePhotoMode;
DispatchQueue.MainQueue.DispatchAsync (() => {
var title = (mode == LivePhotoMode.On) ? "Live Photo Mode: On" : "Live Photo Mode: Off";
LivePhotoModeButton.SetTitle (title, UIControlState.Normal);
});
});
}