[Twisted-Python] Depreciation of trial.unittest functions?

[Paul Swartz]

I'm not sure if Conch is the only project that did this, but it used the
trial.unittest.* functions instead of methods on TestCases.  I used them
to avoid having to pass TestCase instances around all over the places,
or using a global variable.  To avoid the depreciation warnings, I've
starting using the unittest._inst global variable, but I doubt that this
is the appropriate way to change my code.  Is this just not a supported
way of using Trial, or is there something else I should be doing?

-p
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Paul Swartz
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