protected void appendBodyString(StringBuilder buffer) {
        for (Iterator<Item> i = getItemIterator(); i.hasNext();) {
            Item item = i.next();

            buffer.append(item.toString());
            if (i.hasNext()) {
                buffer.append(" ");
            }
        }
    }
Encodes just this item, not its regular subitems, to the given buffer.
container-search/src/main/java/com/yahoo/prelude/query/CompositeItem.java