I see your point, but am unsure what a better name would be. This was borrowed from _your_ code, btw. ;)

I'm not entirely sure I like this approach anyway. I had to pass the `Selectors` into the constructor of the object in order to make this work (see https://github.com/mozilla-b2g/gaia/pull/11995/files#L0R12) for an example, and I wasn't crazy about having to do that. Perhaps there is another way? Or perhaps we should just pass the selector in, rather than having this include the extra shortcut of looking it up in the `Selectors` object for us?

What do you think?