protected override void OnElementChanged(ElementChangedEventArgs <Page> e)
{
base.OnElementChanged(e);
page = e.NewElement as CleverBuoyPage;
var activity = this.Context as Activity;
}
protected override void OnElementChanged(VisualElementChangedEventArgs e)
{
base.OnElementChanged(e);
page = e.NewElement as CleverBuoyPage;
}