9 :
MagVolume(pos,rot,shape,mfp,sf), volumeNo(0), copyno(0), theFaces(faces)
MagVolume6Faces(const PositionType &pos, const RotationType &rot, DDSolidShape shape, const std::vector< VolumeSide > &faces, const MagneticFieldProvider< float > *mfp, double sf=1.)