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Add utilities to copy over information from offline jets

Dan Guest requested to merge dguest/training-dataset-dumper:jet-matching into r22

This adds a new algorithm that matches trigger jets to offline jets and copies over arbitrary information.

Part of making this work was changing how we handle trigger BTagging objects. Before I was copying the jets into their own collection and leaving their links to the BTagging object in the trigger container. Unfortunately the BTagging container that trigger adds is a mix of pflow and emtopo jets, which meant:

  • Decorating pflow jets only wasn't EDM safe
  • We couldn't loop over the b-tag container for one jet collection without using the trigger decision tool

Now we create transient copies of both the Jet and BTagging containers.

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