/usr/include/opengm/graphicalmodel/ is in libopengm-dev 2.3.6-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/opengm/graphicalmodel/decomposition/
/usr/include/opengm/graphicalmodel/decomposition/graphicalmodeldecomposer.hxx
/usr/include/opengm/graphicalmodel/decomposition/graphicalmodeldecomposition.hxx
/usr/include/opengm/graphicalmodel/graphicalmodel.hxx
/usr/include/opengm/graphicalmodel/graphicalmodel_explicit_storage.hxx
/usr/include/opengm/graphicalmodel/graphicalmodel_factor.hxx
/usr/include/opengm/graphicalmodel/graphicalmodel_factor_accumulator.hxx
/usr/include/opengm/graphicalmodel/graphicalmodel_factor_operator.hxx
/usr/include/opengm/graphicalmodel/graphicalmodel_function_wrapper.hxx
/usr/include/opengm/graphicalmodel/graphicalmodel_hdf5.hxx
/usr/include/opengm/graphicalmodel/graphicalmodel_manipulator.hxx
/usr/include/opengm/graphicalmodel/graphviews/
/usr/include/opengm/graphicalmodel/graphviews/factorgraph.hxx
/usr/include/opengm/graphicalmodel/modelgenerators/
/usr/include/opengm/graphicalmodel/modelgenerators/syntheticmodelgenerator.hxx
/usr/include/opengm/graphicalmodel/parameters.hxx
/usr/include/opengm/graphicalmodel/space/
/usr/include/opengm/graphicalmodel/space/discretespace.hxx
/usr/include/opengm/graphicalmodel/space/grid_space.hxx
/usr/include/opengm/graphicalmodel/space/simplediscretespace.hxx
/usr/include/opengm/graphicalmodel/space/space_base.hxx
/usr/include/opengm/graphicalmodel/space/static_simplediscretespace.hxx
/usr/include/opengm/graphicalmodel/space/vector_view_space.hxx
/usr/include/opengm/graphicalmodel/space/viewspace.hxx