def start(self, application):
        """
        Save the logging start on the C{runner} instance.
        """
        self.runner.order.append("log")
        self.runner.hadApplicationLogObserver = hasattr(self.runner,
                                                        'application')

        Save the logging start on the C{runner} instance.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/test/test_twistd.py