src/main/java/com/bazaarvoice/jless/parser/Parser.java
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