/usr/lib/ada/ is in libdbusada1-dev 0.3-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ada/adalib/
/usr/lib/ada/adalib/dbus-ada/
/usr/lib/ada/adalib/dbus-ada/d_bus-arguments-basic.ali
/usr/lib/ada/adalib/dbus-ada/d_bus-arguments-containers.ali
/usr/lib/ada/adalib/dbus-ada/d_bus-arguments.ali
/usr/lib/ada/adalib/dbus-ada/d_bus-callbacks.ali
/usr/lib/ada/adalib/dbus-ada/d_bus-connection-g_main.ali
/usr/lib/ada/adalib/dbus-ada/d_bus-connection.ali
/usr/lib/ada/adalib/dbus-ada/d_bus-g_main.ali
/usr/lib/ada/adalib/dbus-ada/d_bus-marshaling.ali
/usr/lib/ada/adalib/dbus-ada/d_bus-messages.ali
/usr/lib/ada/adalib/dbus-ada/d_bus-service.ali
/usr/lib/ada/adalib/dbus-ada/d_bus-types.ali
/usr/lib/ada/adalib/dbus-ada/d_bus.ali
/usr/lib/ada/adalib/dbus-ada/dbus_address_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_arch_deps_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_bus_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_connection_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_errors_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_memory_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_message_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_misc_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_pending_call_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_server_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_shared_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_signature_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_threads_h.ali
/usr/lib/ada/adalib/dbus-ada/dbus_types_h.ali
/usr/lib/ada/adalib/dbus-ada/stdarg_h.ali
/usr/lib/ada/adalib/dbus-ada/stddef_h.ali