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: marshaler_examples_test.go
    path of file: ./repos/aws-sdk-go-v2/feature/dynamodbstreams/attributevalue
    
    the code of the file until where you have to start completion: package attributevalue_test

import (
	"fmt"
	"reflect"

	"github.com/aws/aws-sdk-go-v2/feature/dynamodbstreams/attributevalue"
	"github.com/aws/aws-sdk-go-v2/internal/awsutil"
	"github.com/aws/aws-sdk-go-v2/service/dynamodbstreams/types"
)

func ExampleMarshal() {
	type Record struct {
		Bytes   []byte
		MyField string
		Letters []string
		Numbers []int
	}

	r := Record{
		Bytes:   []byte{48, 49},
		MyField: "MyFieldValue",
		Letters: []string{"a", "b", "c", "d"},
		Numbers: []int{1, 2, 3},
	}
	av, err := attributevalue.Marshal(r)
	m := av.(*types.AttributeValueMemberM)
	fmt.Println("err", err)
	fmt.Println("Bytes", awsutil
    
func ExampleMarshal() {
	type Record struct {
		Bytes   []byte
		MyField string
		Letters []string
		Numbers []int
	}

	r := Record{
		Bytes:   []byte{48, 49},
		MyField: "MyFieldValue",
		Letters: []string{"a", "b", "c", "d"},
		Numbers: []int{1, 2, 3},
	}
	av, err := attributevalue.Marshal(r)
	m := av.(*types.AttributeValueMemberM)
	fmt.Println("err", err)
	fmt.Println("Bytes", awsutil.Prettify(m.Value["Bytes"]))
	fmt.Println("MyField", awsutil.Prettify(m.Value["MyField"]))
	fmt.Println("Letters", awsutil.Prettify(m.Value["Letters"]))
	fmt.Println("Numbers", awsutil.Prettify(m.Value["Numbers"]))

	// output:
	// err <nil>
	// Bytes &{
	//   Value: <binary> len 2
	// }
	// MyField &{
	//   Value: "MyFieldValue"
	// }
	// Letters &{
	//   Value: [
	//     &{
	//       Value: "a"
	//     },
	//     &{
	//       Value: "b"
	//     },
	//     &{
	//       Value: "c"
	//     },
	//     &{
	//       Value: "d"
	//     }
	//   ]
	// }
	// Numbers &{
	//   Value: [
	//     &{
	//       Value: "1"
	//     },
	//     &{
	//       Value: "2"
	//     },
	//     &{
	//       Value: "3"
	//     }
	//   ]
	// }
}