private ItemDiscloser expose(Item item) {
        ItemDiscloser itemDiscloser = new ItemDiscloser(item);
        item.disclose(itemDiscloser);
        return itemDiscloser;
    }
Creates a detailed representation of a query tree.

@author Tony Vaagenes
container-search/src/main/java/com/yahoo/prelude/query/textualrepresentation/TextualQueryRepresentation.java