module mod1 {

    prefix abc;

    namespace "urn:cesnet:mod1";

    import mod3 {

        prefix mod;

    }

    include sub1;

    feature f1;

    feature f2 {

        if-feature f3;

    }

    feature f4 {

        if-feature f2;

    }

    container ccc {

        leaf empty { type empty; }

        if-feature f2;

    }

    container mod {

        leaf leaf { type uint8; }

        if-feature mod:f2;

    }

}