@GwtIncompatible // NullPointerTester
  @AndroidIncompatible // see ImmutableTableTest.testNullPointerInstance
  public void testNullPointerExceptions() {
    new NullPointerTester()
        .setDefault(Enum.class, SomeEnum.A)
        .setDefault(Class.class, SomeEnum.class) // for newEnumSet
        .testAllPublicStaticMethods(Sets.class);
  }

  public void testNewSetFromMap() {

                proxy = new Proxy(Type.HTTP, addr);
                if (StringUtil.isNotBlank(getHttpProxyUsername())) {
                    Authenticator.setDefault(new Authenticator() {
                        @Override
                        protected PasswordAuthentication getPasswordAuthentication() {

  }

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

  private static class Assignability<From, To> {

    boolean isAssignable() {

  }

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

  private static class Assignability<From, To> {

    boolean isAssignable() {

    }
  }

  @AfterEach fun tearDown() {
//    TODO reenable after https://github.com/square/okhttp/issues/8206
//    fileSystem.checkNoOpenFiles()
    cache.close()

    java.net.Authenticator.setDefault(null)
  }

  @ParameterizedTest
  @ArgumentsSource(ProtocolParamProvider::class)
  fun get(
    protocol: Protocol,
    mockWebServer: MockWebServer,
  ) {
    setUp(protocol, mockWebServer)

  @get:JvmName("proxySelector")
  val proxySelector: ProxySelector =
    when {
      // Defer calls to ProxySelector.getDefault() because it can throw a SecurityException.
      builder.proxy != null -> NullProxySelector
      else -> builder.proxySelector ?: ProxySelector.getDefault() ?: NullProxySelector
    }

  @get:JvmName("proxyAuthenticator")
  val proxyAuthenticator: Authenticator =