First attempt to separate a G4VPhysicsConstructor instance from the AthAlgTool which manages it.
Leaving as draft for now as further changes will be required most likely.
Part of fixes for ATLASSIM-6030
First attempt to separate a G4VPhysicsConstructor instance from the AthAlgTool which manages it.
Leaving as draft for now as further changes will be required most likely.
Part of fixes for ATLASSIM-6030