This will probably get the implementation of the fixtures revised when
we land the new extraction code, but we are setting it up to be generic
against that.
The operator-> thing is kind of a crime. But it also makes the code
vastly more readable so it's impossible to say if it's bad or not.
Change-Id: Ia5aca69cefaa03cd533ad19d20d856ff7e76a546
Jade Lovelace
70319f1840