package main import ( "fmt" "os" "github.com/tinylib/msgp/msgp" ) func main() { // Create a byte buffer to hold MessagePack serialized data. buf := make([]byte, 0, 1024) // Create a new MessagePack writer. writer := msgp.NewWriter(os.Stdout) // Serialize a string and write it to the buffer. err := writer.WriteString("Hello, World!") if err != nil { fmt.Fprintln(os.Stderr, "Error: "+err.Error()) os.Exit(1) } // Flush the writer to ensure all serialized data is written to the buffer. err = writer.Flush() if err != nil { fmt.Fprintln(os.Stderr, "Error: "+err.Error()) os.Exit(1) } // Print the serialized data. fmt.Printf("%#v\n", buf) }In this example, the "msgp.Writer.WriteString" function is used to serialize a string "Hello, World!" into a MessagePack byte stream. The byte stream is then printed to standard output.