Settings with Two Slices and Branches

Hello,

Coud you please help me to use the Settings with two slices and branches?
I'm trying to implement your example but facing an issue with "UserWithBranch" interface...

Thank you!

SettingsAccessor.CreateServiceInstance = xafApplication => new SettingsAccessorDesigner().Slice1().Slice2(getName: slice => slice.SliceObject.UserName, getParentSliceObject: slice => slice.SliceObject.Branch, getSliceObjectsCriteria: slice => CriteriaOperator.Parse("Branch = ?", slice.SliceObject)).SetupCurrentSlice(accessor =>
{
var currentUser = SecuritySystem.CurrentUser as UserWithBranch;
if (currentUser != null)
accessor.ObjectSpace.AppSettings().CurrentSlice(currentUser.Branch, currentUser);
}).CreateSettingsAccessor();