You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: udp.go
    path of file: ./repos/goHackTools/vendor/github.com/google/gopacket/layers
    
    the code of the file until where you have to start completion: // Copyright 2012 Google, Inc. All rights reserved.
// Copyright 2009-2011 Andreas Krennmair. All rights reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file in the root of the source
// tree.

package layers

import (
	"encoding/binary"
	"fmt"

	"github.com/google/gopacket"
)

// UDP is the layer for UDP headers.
type UDP struct {
	BaseLayer
	SrcPort, DstPort UDPPort
	Length           uint16
	Checksum         uint16
	sPort, dPort     []byte
	t
    
func (u *UDP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error {
	var jumbo bool

	payload := b.Bytes()
	if _, ok := u.pseudoheader.(*IPv6); ok {
		if len(payload)+8 > 65535 {
			jumbo = true
		}
	}
	bytes, err := b.PrependBytes(8)
	if err != nil {
		return err
	}
	binary.BigEndian.PutUint16(bytes, uint16(u.SrcPort))
	binary.BigEndian.PutUint16(bytes[2:], uint16(u.DstPort))
	if opts.FixLengths {
		if jumbo {
			u.Length = 0
		} else {
			u.Length = uint16(len(payload)) + 8
		}
	}
	binary.BigEndian.PutUint16(bytes[4:], u.Length)
	if opts.ComputeChecksums {
		// zero out checksum bytes
		bytes[6] = 0
		bytes[7] = 0
		csum, err := u.computeChecksum(b.Bytes(), IPProtocolUDP)
		if err != nil {
			return err
		}
		u.Checksum = csum
	}
	binary.BigEndian.PutUint16(bytes[6:], u.Checksum)
	return nil
}