private String transformQuery(String rawQuery) {
        Parser parser = ParserFactory.newInstance(Query.Type.ALL, new ParserEnvironment());
        Item root = parser.parse(new Parsable().setQuery(rawQuery)).getRoot();
        if (root instanceof NullItem) {
            return null;
        }
        return root.toString();
    }
Tests guards against in single item phrases.

@author Steinar Knutsen
container-search/src/test/java/com/yahoo/prelude/query/parser/test/WashPhrasesTestCase.java