/usr/include/simgear/nasal/cppbind/ is in libsimgear-dev 3.4.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/simgear/nasal/cppbind/Ghost.hxx
/usr/include/simgear/nasal/cppbind/NasalCallContext.hxx
/usr/include/simgear/nasal/cppbind/NasalContext.hxx
/usr/include/simgear/nasal/cppbind/NasalHash.hxx
/usr/include/simgear/nasal/cppbind/NasalObject.hxx
/usr/include/simgear/nasal/cppbind/NasalObjectHolder.hxx
/usr/include/simgear/nasal/cppbind/NasalString.hxx
/usr/include/simgear/nasal/cppbind/detail/
/usr/include/simgear/nasal/cppbind/detail/NasalObject_callMethod_templates.hxx
/usr/include/simgear/nasal/cppbind/detail/from_nasal_function_templates.hxx
/usr/include/simgear/nasal/cppbind/detail/from_nasal_helper.hxx
/usr/include/simgear/nasal/cppbind/detail/functor_templates.hxx
/usr/include/simgear/nasal/cppbind/detail/nasal_traits.hxx
/usr/include/simgear/nasal/cppbind/detail/to_nasal_helper.hxx
/usr/include/simgear/nasal/cppbind/from_nasal.hxx
/usr/include/simgear/nasal/cppbind/to_nasal.hxx