submodule bsub {

  belongs-to b {

    prefix b_pref;

  }

  include btop;

  feature fox;

  notification bar-notif {

    if-feature bar;

  }

  notification fox-notif {

    if-feature fox;

  }

  augment "/b_pref:top" {

    if-feature bar;

    container bar-sub;

  }

  augment "/top" {

    container bar-sub2;

  }

}