def test_extractFieldFlattenFirst(self):
        def flattened(evt):
            flattenEvent(evt)
            return evt
        self.test_extractField(flattened)
L{extractField} behaves identically if the event is explicitly
dataset/ETHPy150Open twisted/twisted/twisted/logger/test/test_flatten.py/FlatFormattingTests.test_extractFieldFlattenFirst