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kotlinlang

1) The derivedContext/deriveFixture combo confused me.  Not sure what to do about it.  But I think there is a difference between grouping tests under a common title and introducing a new context/fixture.  Maybe the API should draw a distinction between the two.  Maybe that would make fixture initialisation more straightforward.
2) I find myself wanting to use the fixture to generated a descriptive test name, but the fixture is not available at the time the test is created.