def visit(self, visitor):
        warnings.warn("Test visitors deprecated in Twisted 8.0",
                      category=DeprecationWarning)
        visitor(self)
Check if HTTP status code is server error.
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/trial/unittest.py/_PyUnitTestCaseAdapter.visit--crossover with--dataset/ETHPy150Open openstack/swift/swift/common/http.py/is_server_error