Sounds like you are storing interfaces in the context. I wouldn't do that. I do hit the occasional nil reference error, but it is usually very rare. If you deal

Sounds like you are storing interfaces in the context. I wouldn't do that. I do hit the occasional nil reference error, but it is usually very rare. If you deal with concrete types, not interfaces, you don't have to worry about that very weird nil but not nil thing. And always use constructors.