> should it move to org.jclouds.googlecomputeengine.compute.domain

That would still be in a domain package, and that's what doesn't feel quite right to me. `RegionAndName` may well be a couple of IDs encoded with a slash, but the name represents a _domain_ concept, not a _type of representation_.

I couldn't find any reference in the API docs to a first-class concept called "SlashEncodedIds" (but didn't look very hard), hence the feeling that this doesn't really belong. If we were doing something like Scala I'd say this looks more like a _trait_ than a _parent class_.

In Java, my gut feel would be to extract the encoding logic into a `util.SlashEncodedIds` class and simply call that, rather than making it part of the inheritance hierarchy. If necessary, this could be `implements SlashEncodedIds` if we want to impose some kind of "contract".

Does that make some kind of sense?