module mod4 {

    prefix abc;

    namespace "urn:cesnet:mod4";

    container cont {

        presence "enable";

    }

    augment "/abc:cont" {

        reference "test reference";

        status "current";

        when "../test = 'true'";

        description "test description";

        when "../test = 'false'"; //duplicated

    }

    leaf test {

        type boolean;

    }

}