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: errors.go
    path of file: ./repos/kubeedge/vendor/github.com/docker/distribution/registry/api/errcode
    
    the code of the file until where you have to start completion: package errcode

import (
	"encoding/json"
	"fmt"
	"strings"
)

// ErrorCoder is the base interface for ErrorCode an
    
func (errs Errors) MarshalJSON() ([]byte, error) {
	var tmpErrs struct {
		Errors []Error `json:"errors,omitempty"`
	}

	for _, daErr := range errs {
		var err Error

		switch daErr := daErr.(type) {
		case ErrorCode:
			err = daErr.WithDetail(nil)
		case Error:
			err = daErr
		default:
			err = ErrorCodeUnknown.WithDetail(daErr)

		}

		// If the Error struct was setup and they forgot to set the
		// Message field (meaning its "") then grab it from the ErrCode
		msg := err.Message
		if msg == "" {
			msg = err.Code.Message()
		}

		tmpErrs.Errors = append(tmpErrs.Errors, Error{
			Code:    err.Code,
			Message: msg,
			Detail:  err.Detail,
		})
	}

	return json.Marshal(tmpErrs)
}