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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 do_renegotiate(self) -> None: """Initiate an SSL renegotiation. """

        if not self._is_handshake_completed:
            raise IOError('SSL Handshake was not completed; cannot renegotiate.')

        self._ssl.renegotiate()
        self.do_handshake()