def unread_pkt_line(self, data):
        if self._readahead is not None:
            raise ValueError('Attempted to unread multiple pkt-lines.')
        self._readahead = StringIO(pkt_line(data))
Unread a single line of data into the readahead buffer.
dataset/ETHPy150Open natestedman/Observatory/observatory/lib/dulwich/protocol.py/Protocol.unread_pkt_line