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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _startHungConnectionTimer(self):
 """ Start a timer to detect if the connection is hung. """

        def hungConnection():
            self._hung_callback()
            self._hungConnectionTimer = None
            self.transport.loseConnection()
        self._hungConnectionTimer = self._reactor.callLater(
            self._HUNG_CONNECTION_TIMEOUT, hungConnection)