/usr/include/paraview/vtkdiy/ is in paraview-dev 5.1.2+dfsg1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/paraview/vtkdiy/algorithms.hpp
/usr/include/paraview/vtkdiy/assigner.hpp
/usr/include/paraview/vtkdiy/collection.hpp
/usr/include/paraview/vtkdiy/communicator.hpp
/usr/include/paraview/vtkdiy/constants.h
/usr/include/paraview/vtkdiy/critical-resource.hpp
/usr/include/paraview/vtkdiy/decomposition.hpp
/usr/include/paraview/vtkdiy/detail/
/usr/include/paraview/vtkdiy/detail/algorithms/
/usr/include/paraview/vtkdiy/detail/algorithms/kdtree-sampling.hpp
/usr/include/paraview/vtkdiy/detail/algorithms/kdtree.hpp
/usr/include/paraview/vtkdiy/detail/algorithms/sort.hpp
/usr/include/paraview/vtkdiy/detail/collectives.hpp
/usr/include/paraview/vtkdiy/detail/reduce/
/usr/include/paraview/vtkdiy/detail/reduce/all-to-all.hpp
/usr/include/paraview/vtkdiy/io/
/usr/include/paraview/vtkdiy/io/block.hpp
/usr/include/paraview/vtkdiy/io/bov.hpp
/usr/include/paraview/vtkdiy/io/numpy.hpp
/usr/include/paraview/vtkdiy/link.hpp
/usr/include/paraview/vtkdiy/master.hpp
/usr/include/paraview/vtkdiy/mpi/
/usr/include/paraview/vtkdiy/mpi.hpp
/usr/include/paraview/vtkdiy/mpi/collectives.hpp
/usr/include/paraview/vtkdiy/mpi/communicator.hpp
/usr/include/paraview/vtkdiy/mpi/constants.hpp
/usr/include/paraview/vtkdiy/mpi/datatypes.hpp
/usr/include/paraview/vtkdiy/mpi/io.hpp
/usr/include/paraview/vtkdiy/mpi/operations.hpp
/usr/include/paraview/vtkdiy/mpi/optional.hpp
/usr/include/paraview/vtkdiy/mpi/point-to-point.hpp
/usr/include/paraview/vtkdiy/mpi/request.hpp
/usr/include/paraview/vtkdiy/mpi/status.hpp
/usr/include/paraview/vtkdiy/no-thread.hpp
/usr/include/paraview/vtkdiy/partners/
/usr/include/paraview/vtkdiy/partners/all-reduce.hpp
/usr/include/paraview/vtkdiy/partners/common.hpp
/usr/include/paraview/vtkdiy/partners/merge.hpp
/usr/include/paraview/vtkdiy/partners/swap.hpp
/usr/include/paraview/vtkdiy/pick.hpp
/usr/include/paraview/vtkdiy/proxy.hpp
/usr/include/paraview/vtkdiy/reduce-operations.hpp
/usr/include/paraview/vtkdiy/reduce.hpp
/usr/include/paraview/vtkdiy/serialization.hpp
/usr/include/paraview/vtkdiy/storage.hpp
/usr/include/paraview/vtkdiy/thread/
/usr/include/paraview/vtkdiy/thread.hpp
/usr/include/paraview/vtkdiy/thread/fast_mutex.h
/usr/include/paraview/vtkdiy/thread/tinythread.cpp
/usr/include/paraview/vtkdiy/thread/tinythread.h
/usr/include/paraview/vtkdiy/time.hpp
/usr/include/paraview/vtkdiy/types.h
/usr/include/paraview/vtkdiy/types.hpp