Help With Templated Links

So, if I have a link, and I know it's templated... There's not a way for me to use that information to actually build a query. In my case, I suspect that it takes some argument I'm interested in, but this being hypermedia, I should check before I just go ahead with things. What I'd like is a method that transparently proxies `URITemplate#variables` so that I can at least make sure the template still includes the thing I want to use.

If I put together a PR with this, does that sound like something worth merging?