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: main.go
    path of file: ./repos/sharingan/grpc-server/v1.33.2/examples/features/keepalive/client
    
    the code of the file until where you have to start completion: /*
 *
 * Copyright 2019 gRPC
    
func main() {
	flag.Parse()

	conn, err := grpc.Dial(*addr, grpc.WithInsecure(), grpc.WithKeepaliveParams(kacp))
	if err != nil {
		log.Fatalf("did not connect: %v", err)
	}
	defer conn.Close()

	c := pb.NewEchoClient(conn)

	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Minute)
	defer cancel()
	fmt.Println("Performing unary request")
	res, err := c.UnaryEcho(ctx, &pb.EchoRequest{Message: "keepalive demo"})
	if err != nil {
		log.Fatalf("unexpected error from UnaryEcho: %v", err)
	}
	fmt.Println("RPC response:", res)
	select {} // Block forever; run with GODEBUG=http2debug=2 to observe ping frames and GOAWAYs due to idleness.
}