def visit(self, visitor):
        warnings.warn("Test visitors deprecated in Twisted 8.0",
                      category=DeprecationWarning)
        visitor(self._test)
sub-classes to define
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/trial/runner.py/PyUnitTestCase.visit--crossover with--dataset/ETHPy150Open pydata/pandas/pandas/core/base.py/SelectionMixin._gotitem