Yeah, agreed. And in that case you should treat the "data object" as opaque, in which case it should be sufficient to pass it by reference. Hence, if you're rea

Yeah, agreed. And in that case you should treat the "data object" as opaque, in which case it should be sufficient to pass it by reference. Hence, if you're reaching for deepClone, it's a code smell - why can't you pass the reference? Are you mutating the data object somewhere that you shouldn't be?