private IEnumerable<IEnumerable<MenuItem>> GetSources(IContent menu)
{
foreach (var provider in _menuProviders) {
var builder = new NavigationBuilder();
IEnumerable<MenuItem> items = null;
try {
provider.GetMenu(menu, builder);
items = builder.Build();
}
catch (Exception ex) {
Logger.Error(ex, "Unexpected error while querying a menu provider. It was ignored. The menu provided by the provider may not be complete.");
}
if (items != null) {
yield return items;
}
}
}
