return ImmutableListMultimap.<String, Integer>builder()
        .put("foo", 1)
        .put("bar", 2)
        .put("foo", 3)
        .build();
  }

  public void testMultimapReads() {
    Multimap<String, Integer> multimap = createMultimap();
    assertTrue(multimap.containsKey("foo"));
    assertFalse(multimap.containsKey("cat"));
    assertTrue(multimap.containsValue(1));

  public void testEmptyMultimapWrites() {
    Multimap<String, Integer> multimap = ImmutableSetMultimap.of();
    UnmodifiableCollectionTests.assertMultimapIsUnmodifiable(multimap, "foo", 1);
  }

  public void testMultimapReads() {
    Multimap<String, Integer> multimap = createMultimap();
    assertTrue(multimap.containsKey("foo"));
    assertFalse(multimap.containsKey("cat"));
    assertTrue(multimap.containsValue(1));

  public void testEmptyMultimapWrites() {
    Multimap<String, Integer> multimap = ImmutableSetMultimap.of();
    UnmodifiableCollectionTests.assertMultimapIsUnmodifiable(multimap, "foo", 1);
  }

  public void testMultimapReads() {
    Multimap<String, Integer> multimap = createMultimap();
    assertTrue(multimap.containsKey("foo"));
    assertFalse(multimap.containsKey("cat"));
    assertTrue(multimap.containsValue(1));