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: types.go
    path of file: ./repos/moby/libnetwork/types
    
    the code of the file until where you have to start completion: // Package types contains types that are common across libnetwork project
package types

import (
	"bytes"
	"f
    
func ParseProtocol(s string) Protocol {
	switch strings.ToLower(s) {
	case "icmp":
		return ICMP
	case "udp":
		return UDP
	case "tcp":
		return TCP
	case "sctp":
		return SCTP
	default:
		return 0
	}
}