/usr/share/netgen/libsrc/meshing/ is in netgen-headers 4.9.13.dfsg-8build2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/netgen/libsrc/meshing/adfront2.hpp
/usr/share/netgen/libsrc/meshing/adfront3.hpp
/usr/share/netgen/libsrc/meshing/basegeom.hpp
/usr/share/netgen/libsrc/meshing/bcfunctions.hpp
/usr/share/netgen/libsrc/meshing/bisect.hpp
/usr/share/netgen/libsrc/meshing/boundarylayer.hpp
/usr/share/netgen/libsrc/meshing/classifyhpel.hpp
/usr/share/netgen/libsrc/meshing/clusters.hpp
/usr/share/netgen/libsrc/meshing/curvedelems.hpp
/usr/share/netgen/libsrc/meshing/findip.hpp
/usr/share/netgen/libsrc/meshing/findip2.hpp
/usr/share/netgen/libsrc/meshing/geomsearch.hpp
/usr/share/netgen/libsrc/meshing/global.hpp
/usr/share/netgen/libsrc/meshing/hpref_hex.hpp
/usr/share/netgen/libsrc/meshing/hpref_prism.hpp
/usr/share/netgen/libsrc/meshing/hpref_pyramid.hpp
/usr/share/netgen/libsrc/meshing/hpref_quad.hpp
/usr/share/netgen/libsrc/meshing/hpref_segm.hpp
/usr/share/netgen/libsrc/meshing/hpref_tet.hpp
/usr/share/netgen/libsrc/meshing/hpref_trig.hpp
/usr/share/netgen/libsrc/meshing/hprefinement.hpp
/usr/share/netgen/libsrc/meshing/improve2.hpp
/usr/share/netgen/libsrc/meshing/improve3.hpp
/usr/share/netgen/libsrc/meshing/localh.hpp
/usr/share/netgen/libsrc/meshing/meshclass.hpp
/usr/share/netgen/libsrc/meshing/meshfunc.hpp
/usr/share/netgen/libsrc/meshing/meshing.hpp
/usr/share/netgen/libsrc/meshing/meshing2.hpp
/usr/share/netgen/libsrc/meshing/meshing3.hpp
/usr/share/netgen/libsrc/meshing/meshtool.hpp
/usr/share/netgen/libsrc/meshing/meshtype.hpp
/usr/share/netgen/libsrc/meshing/msghandler.hpp
/usr/share/netgen/libsrc/meshing/paralleltop.hpp
/usr/share/netgen/libsrc/meshing/ruler2.hpp
/usr/share/netgen/libsrc/meshing/ruler3.hpp
/usr/share/netgen/libsrc/meshing/specials.hpp
/usr/share/netgen/libsrc/meshing/topology.hpp
/usr/share/netgen/libsrc/meshing/validate.hpp