private void fill(CompositeItem c) {
        for (String w : new String[] { "nalle", "bamse", "teddy" }) {
            c.addItem(new WordItem(w));
        }
    }
Check basic contracts common to "many" item implementations.

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