def revokeVoice(self, roomJID, nick, reason=None, sender=None):
        return self._setRole(roomJID, nick=nick, role='visitor',
                             reason=reason, sender=sender)
Revoke voice from a participant.
dataset/ETHPy150Open ralphm/wokkel/wokkel/muc.py/MUCClientProtocol.revokeVoice