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: guardian_vaa_stats.go
    path of file: ./repos/wormhole/node/hack/release_verification
    
    the code of the file until where you have to start completion: // Usage:
// 		go run guardian_vaa_stats.go
// 		go run guardian_vaa_stats.go 20
    
func main() {
	var onlyafter time.Time = time.Unix(0, 0)
	if len(os.Args) > 1 {
		var err error
		onlyafter, err = time.Parse("2006-01-02 15:04:05.999999999 -0700 MST", strings.Join(os.Args[1:], " "))
		if err != nil {
			fmt.Println(err)
			return
		}
	}

	fmt.Printf("Only looking for VAAs after %s\n\n", onlyafter)

	cids := vaa.GetAllNetworkIDs()
	for _, cid := range cids {
		gp, err := getValidatorIndexForChain(cid, onlyafter)
		if err != nil {
			fmt.Println(err)
			continue
		}
		fmt.Printf("%s\t%v\n", cid, gp)
	}
}