/usr/include/freefoam/conversion/ is in libfreefoam-dev 0.1.0+dfsg+1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/freefoam/conversion/STARCDMeshReader.H
/usr/include/freefoam/conversion/STARCDMeshWriter.H
/usr/include/freefoam/conversion/boundaryRegion.H
/usr/include/freefoam/conversion/cellTable.H
/usr/include/freefoam/conversion/ensightFile.H
/usr/include/freefoam/conversion/ensightGeoFile.H
/usr/include/freefoam/conversion/ensightPart.H
/usr/include/freefoam/conversion/ensightPartCells.H
/usr/include/freefoam/conversion/ensightPartFaces.H
/usr/include/freefoam/conversion/ensightPartI.H
/usr/include/freefoam/conversion/ensightParts.H
/usr/include/freefoam/conversion/ensightPartsI.H
/usr/include/freefoam/conversion/meshReader.H
/usr/include/freefoam/conversion/meshWriter.H
/usr/include/freefoam/conversion/polyDualMesh.H