More fixes to McEventCollection (!41862) · Merge requests · atlas / athena · GitLab

Andrii Verbytskyi requested to merge averbyts/athena:hepmc3_nightly_fixes_23032021_part_1 into master Mar 23, 2021

More fixes to McEventCollection (HepMC3 only), continuation of !41754 (merged)

Fix code logic: add particle/vertices in correct order.
Some code formating

Edited Mar 23, 2021 by Andrii Verbytskyi