assertEquals("Last key should be C", map.lastKey(), "C");
assertEquals("First key in tail map should be B", map.tailMap("B").firstKey(), "B");
assertEquals("Last key in head map should be B", map.headMap("C").lastKey(), "B");
assertEquals("Last key in submap should be B", map.subMap("A", "C").lastKey(), "B");
Comparator c = map.comparator();
assertTrue("natural order, so comparator should be null", c == null);
}
/*
public void testTransformerDecorate() {