namespace Toolkit.Foundation; public class NavigationRegionProvider(INavigationRegionCollection contexts) : INavigationRegionProvider { public object? Get(object key) => contexts.TryGetValue(key, out object? target) ? target : default; public bool TryGet(object name, out object? value) { if (contexts.TryGetValue(name, out object? target)) { value = target; return true; } else { value = null; return false; } } }