code: func (id *PolicyEvaluator) DeserializeIdentity(serializedIdentity []byte) (Identity, error) {
  	mspIdentity, err := id.IdentityDeserializer.DeserializeIdentity(serializedIdentity)
  	if err != nil {
  		return nil, err
  	}
  	return &identity{Identity: mspIdentity}, nil
  }
docs: // DeserializeIdentity unmarshals the given identity to msp.Identity