assertEquals(0,proxied.getRemoveAllCount());
collection.removeAll(null);
assertEquals(1,proxied.getRemoveAllCount());
assertEquals(0,proxied.getRetainAllCount());
collection.retainAll(null);
assertEquals(1,proxied.getRetainAllCount());
assertEquals(0,proxied.getRemoveElementCount());
collection.removeElement(1);
assertEquals(1,proxied.getRemoveElementCount());