public void testBidiClearBySubMap() {
if (isRemoveSupported() == false) return;
// extra test as other tests get complex
SortedBidiMap sm = (SortedBidiMap) makeFullMap();
Iterator it = sm.keySet().iterator();
it.next();
Object fromKey = it.next();
Object first = it.next();
Object second = it.next();
Object toKey = it.next();