Better doc in MCDecayTreeTuple
Cherry-pick of MR !443 (merged) to master branch.
(cherry picked from commit 09e7b6ea)
a5a7bb2a Better doc in MCDecayTreeTuple 94059c13 Update MCDecayTreeTuple.h
Cherry-pick of MR !443 (merged) to master branch.
(cherry picked from commit 09e7b6ea)
a5a7bb2a Better doc in MCDecayTreeTuple 94059c13 Update MCDecayTreeTuple.h