Comment 7 for bug 1242502

No, it's not supported. The action when two are specified is "one of them will be ignored." It's not possible to predict which will be ignored in this situation, because we cannot predict the order in which fixtures are returned by use of reflection.

Probably, we should use stronger language in the warning, since what was really meant was "Dont' do this!"

Yes, this restriction will be lifted in 3.0.