def setUp(self):
        """
        Initialize variables used to verify that the header-processing functions
        are getting called.
        """
        self.handleHeaderCalled = False
        self.handleEndHeadersCalled = False

        Initialize variables used to verify that the header-processing functions
        are getting called.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/test/test_http.py