This MR reports the jets participating in the passing the jet hypo by chain leg.
The leg index is taken to be the position of the chain part that describes the leg in the "chainParts" entry of the chainDict which is passed to jet configuration code.
This is clearly fragile. More robust would be to have the chainPart contained the leg label. If and when the label is made available, the jet code will be updated.
The label is propagated through the jet configuration process, and is passed to the relevant C++ AlgTools.