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: storagepolicy.go
    path of file: ./repos/goldfish/vendor/github.com/Azure/azure-storage-go
    
    the code of the file until where you have to start completion: package storage

import (
	"strings"
	"time"
)

// AccessPolicyDetailsXML has specifics about an access policy
// annotated with XML details.
type AccessPolicyDetailsXML struct {
	StartTime  time.Time `xml:"Start"`
	ExpiryTime time.Time `xml:"Expiry"`
	Perm
    
func convertAccessPolicyToXMLStructs(id string, startTime time.Time, expiryTime time.Time, permissions string) SignedIdentifier {
	return SignedIdentifier{
		ID: id,
		AccessPolicy: AccessPolicyDetailsXML{
			StartTime:  startTime.UTC().Round(time.Second),
			ExpiryTime: expiryTime.UTC().Round(time.Second),
			Permission: permissions,
		},
	}
}