merge two accumulated values together
merge two accumulated values together
one set of accumulated data
another set of accumulated data
both data sets merged together
Add additional data to the accumulator value.
Add additional data to the accumulator value.
the current value of the accumulator
the data to be added to the accumulator
the new value of the accumulator
A simpler version of AccumulableParam where the only datatype you can add in is the same type as the accumulated value