private void ClearCacheIfNeed(IDataContext context, IViewModel viewModelTo)
{
if (!context.GetData(ClearNavigationCache) || CachePolicy == null)
{
return;
}
var viewModels = CachePolicy.Invalidate(context);
foreach (var viewModelFrom in viewModels.Reverse())
{
var navigationContext = new NavigationContext(NavigationType.Page, NavigationMode.Reset, viewModelFrom, viewModelTo, this);
if (!OnViewModelClosed(viewModelFrom, navigationContext, this, true))
{
CompleteOperationCallback(viewModelFrom, navigationContext);
}
}
}