//! `SingleInstanceViewAttribute` (ReactiveUI.Binding, `View/SingleInstanceViewAttribute.cs`).
/// A view created once and reused each time its view model's view is resolved
/// (`SingleInstanceViewAttribute`): an option of a view registration
/// ([`ViewRegistrationOptions`](crate::ViewRegistrationOptions)). Not for a view that may appear in
/// several places of the tree of views at once.
;