// Write 20 zero bytes for null context handle
            for (int i = 0; i < 20; i++) {
                buf.enc_ndr_small(0);
            }
        }
    }

    @Override
    protected void decodeWitnessParameters(NdrBuffer buf) throws NdrException {
        // Decode output parameters for WitnessUnregister

        // Context handle is modified by the server (typically zeroed out)
        if (contextHandle == null) {

     */
    protected abstract void decodeWitnessParameters(NdrBuffer buf) throws NdrException;

    @Override
    public void encode_in(NdrBuffer buf) throws NdrException {
        encodeWitnessParameters(buf);
    }

    @Override
    public void decode_out(NdrBuffer buf) throws NdrException {
        decodeWitnessParameters(buf);

                buf.enc_ndr_small(0);
            }
        }

        // Sequence number (64-bit)
        buf.enc_ndr_hyper(sequenceNumber);
    }

    @Override
    protected void decodeWitnessParameters(NdrBuffer buf) throws NdrException {
        // Decode output parameters for WitnessHeartbeat

        // Response sequence number (64-bit)
        responseSequenceNumber = buf.dec_ndr_hyper();

        // Flags
        buf.enc_ndr_long(flags);

        // Timeout
        buf.enc_ndr_long(timeout);
    }

    @Override
    protected void decodeWitnessParameters(NdrBuffer buf) throws NdrException {
        // Decode output parameters for WitnessRegister

        // Context handle (20 bytes)
        if (contextHandle == null) {
            contextHandle = new byte[20];

            for (int i = 0; i < 20; i++) {
                buf.enc_ndr_small(0);
            }
        }
    }

    @Override
    protected void decodeWitnessParameters(NdrBuffer buf) throws NdrException {
        // Decode output parameters for WitnessAsyncNotify

        // Response buffer size
        int responseLength = buf.dec_ndr_long();