/usr/include/palabos/particles/ is in libplb-dev 1.5~r1+repack1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/palabos/particles/headers2D.h
/usr/include/palabos/particles/headers2D.hh
/usr/include/palabos/particles/headers3D.h
/usr/include/palabos/particles/headers3D.hh
/usr/include/palabos/particles/multiParticleField2D.h
/usr/include/palabos/particles/multiParticleField2D.hh
/usr/include/palabos/particles/multiParticleField3D.h
/usr/include/palabos/particles/multiParticleField3D.hh
/usr/include/palabos/particles/particle2D.h
/usr/include/palabos/particles/particle2D.hh
/usr/include/palabos/particles/particle3D.h
/usr/include/palabos/particles/particle3D.hh
/usr/include/palabos/particles/particleField2D.h
/usr/include/palabos/particles/particleField2D.hh
/usr/include/palabos/particles/particleField3D.h
/usr/include/palabos/particles/particleField3D.hh
/usr/include/palabos/particles/particleIdentifiers2D.h
/usr/include/palabos/particles/particleIdentifiers2D.hh
/usr/include/palabos/particles/particleIdentifiers3D.h
/usr/include/palabos/particles/particleIdentifiers3D.hh
/usr/include/palabos/particles/particleNonLocalTransfer2D.h
/usr/include/palabos/particles/particleNonLocalTransfer2D.hh
/usr/include/palabos/particles/particleNonLocalTransfer3D.h
/usr/include/palabos/particles/particleNonLocalTransfer3D.hh
/usr/include/palabos/particles/particleProcessingFunctional2D.h
/usr/include/palabos/particles/particleProcessingFunctional2D.hh
/usr/include/palabos/particles/particleProcessingFunctional3D.h
/usr/include/palabos/particles/particleProcessingFunctional3D.hh
/usr/include/palabos/particles/particleVtk3D.h
/usr/include/palabos/particles/particleVtk3D.hh
/usr/include/palabos/particles/visualParticle2D.h
/usr/include/palabos/particles/visualParticle2D.hh
/usr/include/palabos/particles/visualParticle3D.h
/usr/include/palabos/particles/visualParticle3D.hh
/usr/include/palabos/particles/visualParticleFunctional3D.h
/usr/include/palabos/particles/visualParticleFunctional3D.hh
/usr/include/palabos/particles/visualParticleWrapper3D.h
/usr/include/palabos/particles/visualParticleWrapper3D.hh