updateEntity method
      
  
Future<MemberSubscriptionEntity> 
updateEntity(
    
- String documentID,
- MemberSubscriptionEntity value
override
    Update a MemberSubscriptionEntity in the repository, cached
Implementation
@override
Future<MemberSubscriptionEntity> updateEntity(
    String documentID, MemberSubscriptionEntity value) {
  return reference.updateEntity(documentID, value);
}