private bool CanCloseViewModel(IViewModel viewModel, object parameter)
{
IDataContext context;
if (!viewModel.Settings.Metadata.TryGetData(CloseContextConstant, out context))
{
context = new DataContext
{
{ NavigationConstants.ViewModel, viewModel }
};
viewModel.Settings.Metadata.AddOrUpdate(CloseContextConstant, context);
}
if (parameter != null)
{
context.AddOrUpdate(NavigationConstants.CloseParameter, parameter);
}
return(NavigationService.CanClose(context));
}