• _config : pmem::kv::config
• _data : pmem::kv::string_view
• _db : pmem::kv::db
• _size : pmem::kv::string_view
• c_cmp : pmem::kv::internal::comparator_config_entry
• cmp : pmem::kv::internal::comparator_wrapper< Comparator >
• ptr : pmem::kv::internal::comparator_config_entry , pmem::kv::internal::unique_ptr_wrapper< T, D >