ImmutableListMultimap.of("foo", 'f', "foo", 'o', "foo", 'o').inverse());
  }

  // Yes, we want to test that inverse() returns the same instance each time that it's called.
  @SuppressWarnings("SelfAssertion")
  public void testInverseMinimizesWork() {
    ImmutableListMultimap<String, Character> multimap =
        ImmutableListMultimap.<String, Character>builder()
            .put("foo", 'f')
            .put("foo", 'o')

        ImmutableSetMultimap.of("of", 'o', "of", 'f', "to", 't', "to", 'o').inverse());
  }

  // Yes, we want to test that inverse() returns the same instance each time that it's called.
  @SuppressWarnings("SelfAssertion")
  public void testInverseMinimizesWork() {
    ImmutableSetMultimap<String, Character> multimap =
        ImmutableSetMultimap.of("of", 'o', "of", 'f', "to", 't', "to", 'o');

        .isEqualTo(0);
  }

  // Yes, we want to test that inverse() returns the same instance each time that it's called.
  @SuppressWarnings("SelfAssertion")
  public void testInverseMinimizesWork() {
    ImmutableListMultimap<String, Character> multimap =
        ImmutableListMultimap.<String, Character>builder()
            .put("foo", 'f')
            .put("foo", 'o')