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In this example, chunk size is 2 (PS_SMD_N_EVENTS=2/ two integrating events per chunk) and batch size is 1 (batch_size=1/ one integrating events per batch). 
EventBuilder receives: 
Note that 0 and 1 (Configure and BeginRun) are skipped
2-3 3 (BeginStep and Enable are broadcasted - not shown below on Bds)

4-10 
11-16
17-20

Bd 0 receives:
4-7
11-13
17-19

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