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: protocols.go
    path of file: ./repos/portmaster/network/reference
    
    the code of the file until where you have to start completion: package reference

import (
	"strconv"
	"strings"
)

var (
	protocolNames = map[uint8]string{
		1:   "ICMP",
		2:   "IGMP",
		6:   "TCP",
		17:  "UDP",
		27:  
    
func IsPacketProtocol(protocol uint8) bool {
	switch protocol {
	case 1, // ICMP
		17,  // UDP
		27,  // RDP
		58,  // ICMP6
		33,  // DCCP
		136: // UDP-LITE
		return true
	default:
		return false
	}
}