One thing to test: aggre a sequence of sequences, and then count the number of items in teh function and add them all together, so jets and agg the # of tracks, so you get jets*times tracks as a total.
The point here is to make sure we are putting things at the correct scoping level when we create the accumulator.
A test:
The point here is to make sure we are putting things at the correct scoping level when we create the accumulator.