@Test
    void testCollapseFalseItemInRank() {
        CompositeItem root = new RankItem();
        root.addItem(new FalseItem()); // false RANK ... is false
        root.addItem(new WordItem("i1"));
        assertCanonicalized("FALSE", null, root);
    }
Multiple levels of RANK should collapse
container-search/src/test/java/com/yahoo/prelude/query/test/QueryCanonicalizerTestCase.java