@Test
 public void toSortedSetWithComparator() {
   ImmutableCollection<Integer> integers = this.classUnderTest();
   MutableSortedSet<Integer> set =
       integers.toSortedSet(Comparators.<Integer>reverseNaturalOrder());
   Assert.assertEquals(integers.toSet(), set);
   Assert.assertEquals(
       integers.toSortedList(Comparators.<Integer>reverseNaturalOrder()), set.toList());
 }
 @Test
 public void toSortedSet() {
   ImmutableCollection<Integer> integers = this.classUnderTest();
   MutableSortedSet<Integer> set = integers.toSortedSet();
   Verify.assertListsEqual(integers.toSortedList(), set.toList());
 }