def to_bytes(self):
        """Pack this Timestamp object into bytes.

        Used for pure-Python msgpack packing.

        :returns data: Payload for EXT message with code -1 (timestamp type)
        :rtype: bytes
        """
        if (self.seconds >> 34) == 0:  # seconds is non-negative and fits in 34 bits
            data64 = self.nanoseconds << 34 | self.seconds
            if data64 & 0xFFFFFFFF00000000 == 0:
                # nanoseconds is zero and seconds < 2**32, so timestamp 32
                data = struct.pack("!L", data64)
            else:
                # timestamp 64
                data = struct.pack("!Q", data64)
        else:
            # timestamp 96
            data = struct.pack("!Iq", self.nanoseconds, self.seconds)
        return data
Pack this Timestamp object into bytes.

        Used for pure-Python msgpack packing.

        :returns data: Payload for EXT message with code -1 (timestamp type)
        :rtype: bytes
        
product/gradle-plugin/src/main/python/pip/_vendor/msgpack/ext.py