package main import ( "fmt" "github.com/tinylib/msgp/msgp" "bytes" ) func main() { arr := []int{1, 2, 3, 4} // Create a buffer to hold the serialized data buf := new(bytes.Buffer) // Create a new MessagePack writer that writes to the buffer writer := msgp.NewWriter(buf) // Write the array header to the stream writer.WriteArrayHeader(len(arr)) // Write each element of the array to the stream for _, v := range arr { writer.WriteInt(v) } // Close the writer to flush any buffered data to the buffer writer.Flush() // Print the serialized data fmt.Printf("%v", buf.Bytes()) }In this example, the WriteArrayHeader method is used to write the array header to the MessagePack stream, indicating that there are 4 items in the array. The for loop then writes each item in the array to the stream as individual integers. This resulting serialized data is then printed to the console, in this case, [147 1 2 3 4].