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: hello-world.go
    path of file: ./repos/Rust-Full-Stack/golang/examples/concurrency
    
    the code of the file until where you have to start completion: package main

import (
	"fmt"
	"time"
)

func main() {
	// create new channel of type string
	ch := make(chan st
    
func main() {
	// create new channel of type string
	ch := make(chan string)

	// start new anonymous goroutine
	go func() {
		time.Sleep(time.Second)
		// send "Hello World" to channel
		ch <- "Hello World"
	}()

	// read from channel
	msg, ok := <-ch
	fmt.Printf("msg='%s', ok='%v'\n", msg, ok)
}