def serialize(self):
        """Convert this recorded RPC into a string."""

        return "{},{: <26},{:2d},{:#06x},{:#04x},{:5.0f},{: <40},{: <40},{}".\
            format(self.connection, self.start_stamp.isoformat(), self.address, self.rpc_id,
                   self.status, self.runtime * 1000, self.call, self.response, self.error)
Convert this recorded RPC into a string.