/usr/include/palabos/io/ is in libplb-dev 1.5~r1+repack1-2+b5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/palabos/io/base64.h
/usr/include/palabos/io/base64.hh
/usr/include/palabos/io/colormaps.h
/usr/include/palabos/io/endianness.h
/usr/include/palabos/io/headers2D.h
/usr/include/palabos/io/headers2D.hh
/usr/include/palabos/io/headers3D.h
/usr/include/palabos/io/headers3D.hh
/usr/include/palabos/io/imageWriter.h
/usr/include/palabos/io/imageWriter.hh
/usr/include/palabos/io/mpiParallelIO.h
/usr/include/palabos/io/multiBlockReader2D.h
/usr/include/palabos/io/multiBlockReader3D.h
/usr/include/palabos/io/multiBlockWriter2D.h
/usr/include/palabos/io/multiBlockWriter3D.h
/usr/include/palabos/io/parallelIO.h
/usr/include/palabos/io/plbFiles.h
/usr/include/palabos/io/serializerIO.h
/usr/include/palabos/io/serializerIO.hh
/usr/include/palabos/io/serializerIO_2D.h
/usr/include/palabos/io/serializerIO_2D.hh
/usr/include/palabos/io/serializerIO_3D.h
/usr/include/palabos/io/serializerIO_3D.hh
/usr/include/palabos/io/transientStatistics3D.h
/usr/include/palabos/io/transientStatistics3D.hh
/usr/include/palabos/io/utilIO_2D.h
/usr/include/palabos/io/utilIO_3D.h
/usr/include/palabos/io/vtkDataOutput.h
/usr/include/palabos/io/vtkDataOutput.hh
/usr/include/palabos/io/vtkStructuredDataOutput.h
/usr/include/palabos/io/vtkStructuredDataOutput.hh