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: json.go
    path of file: ./repos/portainer/api/database/boltdb
    
    the code of the file until where you have to start completion: package boltdb

import (
	"bytes"
	"crypto/aes"
	"crypto/cipher"
	"crypto/rand"
	"fmt"
	"io"

	"github.com/pkg/errors"
	"github.com/segmentio/encoding/json"
)

var errEncryptedStringTooShort = fmt.Errorf("encrypted string too short")

// MarshalObject encodes an object to binary format
func (connection *DbConnection) MarshalObject(object interface{}) ([]byte, error) {
	buf := &bytes.Buffer{}

	// Spe
    
func (connection *DbConnection) MarshalObject(object interface{}) ([]byte, error) {
	buf := &bytes.Buffer{}

	// Special case for the VERSION bucket. Here we're not using json
	if v, ok := object.(string); ok {
		buf.WriteString(v)
	} else {
		enc := json.NewEncoder(buf)
		enc.SetSortMapKeys(false)
		enc.SetAppendNewline(false)

		if err := enc.Encode(object); err != nil {
			return nil, err
		}
	}

	if connection.getEncryptionKey() == nil {
		return buf.Bytes(), nil
	}

	return encrypt(buf.Bytes(), connection.getEncryptionKey())
}