func (v *VDR) Update(didDoc *diddoc.Doc, opts ...vdrapi.DIDMethodOption) error {
	return fmt.Errorf("not supported")
}
Update did doc.
package key
import (
	"fmt"
	diddoc "github.com/hyperledger/aries-framework-go/pkg/doc/did"
	vdrapi "github.com/hyperledger/aries-framework-go/pkg/framework/aries/api/vdr"
)
const (
	DIDMethod = "key"
	EncryptionKey = "encryptionKey"
	KeyType = "keyType"
)
type VDR struct{}
func New() *VDR {
	return &VDR{}
}
func (v *VDR) Accept(method string) bool {
	return method == DIDMethod
}
func (v *VDR) Close() error {
	return nil
}