def METHOD_NAME(self, op, data=b'', replen=None):
    msg = struct.pack("<IIII", op, 16 + len(data), 0, 0) + data
    if replen is not None:
        replen += 8
    resp = super().METHOD_NAME(0xc0, msg, replen)
    if not resp:
        return
    rcmd, rlen = struct.unpack("<II", resp[:8])
    return resp[8:rlen]