def endheaders(self, message_body=None):
    if message_body is not None:
      self.send(message_body)
This tests expect_exact() for which pattern is returned
dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/appengine/dist27/gae_override/httplib.py/HTTPConnection.endheaders--crossover with--dataset/ETHPy150Open Calysto/metakernel/metakernel/tests/test_expect.py/ExpectTestCase.test_ordering_exact