/usr/include/dune/pdelab/function/ is in libdune-pdelab-dev 2.5.0~rc1-2build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/dune/pdelab/function/callableadapter.hh
/usr/include/dune/pdelab/function/const.hh
/usr/include/dune/pdelab/function/division.hh
/usr/include/dune/pdelab/function/inverse.hh
/usr/include/dune/pdelab/function/localfunction.hh
/usr/include/dune/pdelab/function/localfunctionhelper.hh
/usr/include/dune/pdelab/function/memberadaptor.hh
/usr/include/dune/pdelab/function/minus.hh
/usr/include/dune/pdelab/function/oldinterfaceadapter.hh
/usr/include/dune/pdelab/function/product.hh
/usr/include/dune/pdelab/function/scalarscaled.hh
/usr/include/dune/pdelab/function/selectcomponent.hh
/usr/include/dune/pdelab/function/sqr.hh
/usr/include/dune/pdelab/function/sqrt.hh
/usr/include/dune/pdelab/function/tags.hh