27 int ret = (*this)(pv, level);
28 TGeoNode* node = pv.ptr();
30 for (Int_t idau = 0, ndau = node->GetNdaughters(); idau < ndau; ++idau) {
33 ret +=
process(placement,level+1,recursive);
39 except(
"PlacedVolume",
"Cannot process an invalid PlacedVolume element");