Sweeping !54194 from master to 22.0. KLGaussianReduction organise and comment the code better (!54233) · Merge requests · atlas / athena · GitLab

Atlas Nightlybuild requested to merge cherry-pick-23691d53b25-22.0 into 22.0 Jun 13, 2022

KLGaussianReduction organise and comment the code better

See merge request !54194 (merged)