CaloExtensionTool : Add comments/explanation (!29113) · Merge requests · atlas / athena · GitLab

Christos Anastopoulos requested to merge ATLAS-EGamma/athena:CaloExtensionTool_magic_number_3 into master Dec 20, 2019

Added some comments

On where the 3 comes to the argument to extrapolate
Why we need to do a clone. Hopefully in the future some of the main extrapolator factory methods will return non-const