Draft: Dynamic definition of particle for Gauss-on-Gsino when using G4 10.7
This is to port to Sim11 master
the dynamic definition of particles we have introudced in Sim10 in a clean way. As that requires a workaround from G4 10.7.
(see !910 (merged), !968 (merged) and !1012 in Sim10).
Edited by Gloria Corti