@Test
public void testBitSetFast0() {

	// empty
	final Set<E1> set = new FastEnumSet<E1>(E1.values());
	int count;
	count = 0;
	for (final E1 event : set) {
		count++;
		out.println(event);
	}
	assertEquals(count, 0);
	set.add(E1.a);
	set.add(E1.c);
	count = 0;
	for (final E1 event : set) {
		count++;
		out.println(event.mask());
	}
	assertEquals(count, 2);
}