Do not lower-case material names, G4 is case sensitive
See https://allpix-squared-forum.web.cern.ch/t/material-not-found-on-detector-model-file/440
Also added tests retrieving materials from NistManager
.
See https://allpix-squared-forum.web.cern.ch/t/material-not-found-on-detector-model-file/440
Also added tests retrieving materials from NistManager
.