> e.g. if somepackage.Bar suddenly gets a member with same name as one of your URL members?

I think nothing happens there. Your fields "win" on depth and you'd have to access their field with `thing.Bar.Conflicted` (whereas yours would be `thing.Conflicted`).

It could only be a problem if someone embeds both `somepackage.Bar` and `mypackage.Cheese` into `T` with a shared field `X` but then you can't access `T.X` without a runtime error of "ambiguous selector".