Rule OnlyIndicator() {
        return Sequence(
                "only",
                peek().addChild(new SimpleNode(match())), peek().addChild(new SimpleNode(" ")),
                Ws0()
        );
    }
Rule OnlyIndicator ( ) { return Sequence ( "only" , peek ( ) . addChild ( new SimpleNode ( match ( ) ) ) , peek ( ) . addChild ( new SimpleNode ( " " ) ) , Ws0 ( ) ) ; }
"only" Whitespace