Hi, I would guess that Aggregator implementations have to be associative and commutative. Otherwise they can't be used in Combiners in a deterministic way. Am I right?
If this is the case I'd suggest we add a big fat warning to our StringConcatAggregator, because string concatenation isn't commutative. Or maybe even remove it from our core API because it's a bad role model? Thanks, Matthias
