assertThat(map).containsExactlyEntriesIn(expected).inOrder();
    assertThat(map).isInstanceOf(JdkBackedImmutableMap.class);
  }

  @GwtIncompatible // Pattern, Matcher
  public void testBuilder_keepingLast_thenOrThrow() {
    ImmutableMap.Builder<String, Integer> builder =
        new Builder<String, Integer>()
            .put("three", 3)
            .put("one", 1)
            .put("five", 5)

    assertThat(map).containsExactlyEntriesIn(expected).inOrder();
  }

  @GwtIncompatible // Pattern, Matcher
  public void testBuilder_keepingLast_thenOrThrow() {
    ImmutableMap.Builder<String, Integer> builder =
        new Builder<String, Integer>()
            .put("three", 3)
            .put("one", 1)
            .put("five", 5)