static Task <bool> PlatformCanOpenAsync(Uri uri) => Task.FromResult(UIApplication.SharedApplication.CanOpenUrl(WebUtils.GetNativeUrl(uri)));
static Task PlatformOpenAsync(Uri uri) => PlatformOpenAsync(WebUtils.GetNativeUrl(uri));
static Task PlatformOpenAsync(Uri uri) => UIApplication.SharedApplication.OpenUrlAsync(WebUtils.GetNativeUrl(uri), new UIApplicationOpenUrlOptions());