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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 _toc_fetch_finished(self):
 """Callback for when the TOC fetching is finished"""

        self.cf.remove_port_callback(self.port, self._new_packet_cb)
        logger.debug('[%d]: Done!', self.port)
        self.finished_callback()