Catel.Services.UIVisualizerService.DisplayUsingNavigation C# (CSharp) Method

        private async Task DisplayUsingNavigation(IViewModel viewModel, EventHandler<UICompletedEventArgs> completedProc, StackLayout contentLayout)
        {
            var contentPage = new ContentPage
            {
                Content = contentLayout
            };

            _callbacks[contentPage] = new Tuple<IViewModel, EventHandler<UICompletedEventArgs>>(viewModel, completedProc);
            contentPage.BackButtonPressed += OnBackButtonPressed;
            await NavigationHelper.PushModalAsync(contentPage);
        }