Do you have an example to show how to self-reference the model

[hanyoujia]

`
@Edm.Annotate({
term: "UI.DisplayName",
string: "Products"
})

export class Product{
@Edm.Key
@Edm.Computed
@edm.String
@Edm.Convert(toObjectID)
@Edm.Annotate({
term: "UI.DisplayName",
string: "Product identifier"
}, {
term: "UI.ControlHint",
string: "ReadOnly"
})
_id:ObjectID
@Edm.ForeignKey("Product")
@Edm.EntityType(Edm.ForwardRef(() => Product))
@Edm.Partner("Product")
Product:Product
UnitPrice:number
}

`