Sweeping !27924 from 21.3 to master. Fix MMPrepDataContainerCnv_p1 to correctly read/write all MMPrepData objects (also those for multilayer 2) (!28084) · Merge requests · atlas / athena

Fix MMPrepDataContainerCnv_p1 to correctly read/write all MMPrepData objects (also those for multilayer 2)

See merge request !27924 (merged)

Sweeping !27924 from 21.3 to master. Fix MMPrepDataContainerCnv_p1 to correctly read/write all MMPrepData objects (also those for multilayer 2)