Hi guys,
maybe someone can help me out.
I'm trying to write my own CombinerAggregator. Hence I'm extending the CombinerAggregator<T> Interface but I do not know how to efficiently implement the 'T combine(T val1, T val2)' method.
Is it allowed to modify the val1 attribute and then return it or should I create a new object and combine the values inside the newly created one?
