/usr/include/Bpp/Phyl/Mapping/ is in libbpp-phyl-dev 2.0.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/Bpp/Phyl/Mapping/AnalyticalSubstitutionCount.h
/usr/include/Bpp/Phyl/Mapping/DecompositionSubstitutionCount.h
/usr/include/Bpp/Phyl/Mapping/IndexToCount.h
/usr/include/Bpp/Phyl/Mapping/OneJumpSubstitutionCount.h
/usr/include/Bpp/Phyl/Mapping/ProbabilisticSubstitutionMapping.h
/usr/include/Bpp/Phyl/Mapping/SimpleSubstitutionCount.h
/usr/include/Bpp/Phyl/Mapping/SubstitutionCount.h
/usr/include/Bpp/Phyl/Mapping/SubstitutionMapping.h
/usr/include/Bpp/Phyl/Mapping/SubstitutionMappingTools.h
/usr/include/Bpp/Phyl/Mapping/SubstitutionRegister.h
/usr/include/Bpp/Phyl/Mapping/UniformizationSubstitutionCount.h