Xaml != WPF. In Xamarin Forms land that property is a bool. We have `bool IsVisible`. The problem is the design, and that will change over time as the various

Xaml != WPF. In Xamarin Forms land that property is a bool. We have `bool IsVisible`. The problem is the design, and that will change over time as the various flavours of Xaml are supposedly on a path to converge.