You can definetly use both of them, and I think our documentation does not do a good enough job in demonstrating how, indeed, at the moment.
Yes it was quite unclear.
This update comes far too late for anyone in this initial discussion, but we’ve updated the handleSummary doc to be clearer. Hopefully it helps future users make the output or outputs that they want. If anything still seems confusing, never hesitate to make an issue!