assertEquals(hashmap.toString(), Maps.toStringImpl(hashmap));
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  public void testNullPointerExceptions() {
    new NullPointerTester().testAllPublicStaticMethods(Maps.class);
  }

  private static final Map<Integer, Integer> EMPTY = emptyMap();
  private static final Map<Integer, Integer> SINGLETON = singletonMap(1, 2);

    assertFalse(changed);
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  public void testNullPointerExceptions() {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicStaticMethods(Iterators.class);
  }

  @GwtIncompatible // Only used by @GwtIncompatible code
  private abstract static class EmptyIteratorTester extends IteratorTester<Integer> {
    EmptyIteratorTester() {

    assertEquals(hashmap.toString(), Maps.toStringImpl(hashmap));
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  public void testNullPointerExceptions() {
    new NullPointerTester().testAllPublicStaticMethods(Maps.class);
  }

  private static final Map<Integer, Integer> EMPTY = emptyMap();
  private static final Map<Integer, Integer> SINGLETON = singletonMap(1, 2);

    return new TypeToken<T[]>() {}.where(new TypeParameter<T>() {}, componentType);
  }

  public <T> void testNulls() {
    new NullPointerTester().testAllPublicStaticMethods(TypeToken.class);
    new NullPointerTester()
        .setDefault(TypeParameter.class, new TypeParameter<T>() {})
        .testAllPublicInstanceMethods(TypeToken.of(String.class));
  }