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: sdnotify.go
    path of file: ./repos/learning/golang/practice/go-crontab/gopath/src/github.com/coreos/etcd/vendor/github.com/coreos/go-systemd/daemon
    
    the code of the file until where you have to start completion: // Copyright 2014 Docker, Inc.
// Copyright 2015-2018 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    h
    
func SdNotify(unsetEnvironment bool, state string) (bool, error) {
	socketAddr := &net.UnixAddr{
		Name: os.Getenv("NOTIFY_SOCKET"),
		Net:  "unixgram",
	}

	// NOTIFY_SOCKET not set
	if socketAddr.Name == "" {
		return false, nil
	}

	if unsetEnvironment {
		if err := os.Unsetenv("NOTIFY_SOCKET"); err != nil {
			return false, err
		}
	}

	conn, err := net.DialUnix(socketAddr.Net, nil, socketAddr)
	// Error connecting to NOTIFY_SOCKET
	if err != nil {
		return false, err
	}
	defer conn.Close()

	if _, err = conn.Write([]byte(state)); err != nil {
		return false, err
	}
	return true, nil
}