Example from the mailing list
MockFor and StubFor work by replacing the MetaClass with a ProxyMetaClass
and therefore should not be dependend on whether you instantiate the
object before or inside the use closure.
If they do, it's a bug (maybe introduced by the latest changes to
the MOP impl). Please raise an issue.
I'm flagging this as a blocker because it is MetaClass related and we're on crunch mode.