message: Keep subjects from the same splitting together
  This should just affect the ordering of the subjets output - not
  the actual stored information.
diff: @@ -1244,9 +1244,10 @@ void AliAnalysisTaskJetDynamicalGrooming::ExtractJetSplittings(SubstructureTree:
  j2ConstituentIndices.emplace_back(constituent.user_index());
  }
  jetSplittings.AddSubjet(splittingNodeIndex, followingIterativeSplitting, j1ConstituentIndices);
  - ExtractJetSplittings(jetSplittings, j1, splittingNodeIndex, followingIterativeSplitting);
  -
  jetSplittings.AddSubjet(splittingNodeIndex, false, j2ConstituentIndices);
  +
  + // Recurse as necessary to get the rest of the splittings.
  + ExtractJetSplittings(jetSplittings, j1, splittingNodeIndex, followingIterativeSplitting);
  if (fStoreRecursiveSplittings == true) {
  ExtractJetSplittings(jetSplittings, j2, splittingNodeIndex, false);
  }
  