/usr/include/boost/container/pmr/ is in libboost1.62-dev 1.62.0+dfsg-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/boost/container/pmr/deque.hpp
/usr/include/boost/container/pmr/flat_map.hpp
/usr/include/boost/container/pmr/flat_set.hpp
/usr/include/boost/container/pmr/global_resource.hpp
/usr/include/boost/container/pmr/list.hpp
/usr/include/boost/container/pmr/map.hpp
/usr/include/boost/container/pmr/memory_resource.hpp
/usr/include/boost/container/pmr/monotonic_buffer_resource.hpp
/usr/include/boost/container/pmr/polymorphic_allocator.hpp
/usr/include/boost/container/pmr/pool_options.hpp
/usr/include/boost/container/pmr/resource_adaptor.hpp
/usr/include/boost/container/pmr/set.hpp
/usr/include/boost/container/pmr/slist.hpp
/usr/include/boost/container/pmr/small_vector.hpp
/usr/include/boost/container/pmr/stable_vector.hpp
/usr/include/boost/container/pmr/string.hpp
/usr/include/boost/container/pmr/synchronized_pool_resource.hpp
/usr/include/boost/container/pmr/unsynchronized_pool_resource.hpp
/usr/include/boost/container/pmr/vector.hpp