@Test public void empty() throws Exception { IntSet empty = IntSet.empty(); Random rnd = new Random(); for (int i = 0; i < 1000; i++) { assertFalse(empty.contains(rnd.nextInt())); } }
static IntSet empty() { return complement(universe()); }
IntSet { static IntSet empty() { return complement(universe()); } }
IntSet { static IntSet empty() { return complement(universe()); }  }
IntSet { static IntSet empty() { return complement(universe()); }   }
IntSet { static IntSet empty() { return complement(universe()); }    }