return arbitrary;
    }
    if (type.getRawType() == Class.class) {
      // If parameter is Class<? extends Foo>, we return Foo.class
      @SuppressWarnings("unchecked")
      T defaultClass = (T) getFirstTypeParameter(type.getType()).getRawType();
      return defaultClass;
    }
    if (type.getRawType() == TypeToken.class) {
      // If parameter is TypeToken<? extends Foo>, we return TypeToken<Foo>.

      assertThrows(IllegalArgumentException.class, () -> Resources.getResource("no such resource"));
    } finally {
      Thread.currentThread().setContextClassLoader(oldContextLoader);
    }
  }

  @AndroidIncompatible // .class files aren't available
  public void testNulls() {
    new NullPointerTester()
        .setDefault(URL.class, classfile(ResourcesTest.class))
        .testAllPublicStaticMethods(Resources.class);

     */
    @Test
    public void testForEachJarFile() throws Exception {
        final String classFilePath = TestCase.class.getName().replace('.', '/') + ".class";
        final URL classURL = ResourceUtil.getResource(classFilePath);
        final JarURLConnection con = (JarURLConnection) classURL.openConnection();
        ClassTraversalUtil.forEach(con.getJarFile(), (ClassHandler) (packageName, shortClassName) -> {

                .singleton("fsClient", FileSystemClient.class)//
                .singleton("smbClient", SmbClient.class)//
                .singleton("smb1Client", org.codelibs.fess.crawler.client.smb1.SmbClient.class)//
                .singleton("ftpClient", FtpClient.class)//
                .singleton("storageClient", StorageClient.class)//
                .singleton("clientFactory", CrawlerClientFactory.class);

 * which may be a subtype of the declaring class. For example:
 *
 * <pre>{@code
 * Method getMethod = List.class.getMethod("get", int.class);
 * Invokable<List<String>, ?> invokable = new TypeToken<List<String>>() {}.method(getMethod);
 * assertEquals(TypeToken.of(String.class), invokable.getReturnType()); // Not Object.class!
 * assertEquals(new TypeToken<List<String>>() {}, invokable.getOwnerType());
 * }</pre>

    assertThrows(IllegalStateException.class, () -> setToTest.equals(wrappedSet));
    assertThrows(IllegalStateException.class, () -> setToTest.equals(copyOfWrappedSet));
    assertThrows(IllegalStateException.class, () -> setToTest.equals(copyOfModifiedSet));
    assertThrows(IllegalStateException.class, () -> wrappedSet.equals(setToTest));
    assertThrows(IllegalStateException.class, () -> copyOfWrappedSet.equals(setToTest));

     */
    ClassRealm getCoreRealm();

    /**
     * Gets the class realm exposing the Maven API. This is basically a restricted view on the Maven core realm.
     *
     * @return The class realm exposing the Maven API, never {@code null}.
     */
    ClassRealm getMavenApiRealm();

    /**
     * Gets the class realm exposing the Maven 4 API. This is basically a restricted view on the Maven core realm.
     *

    testers.add(CollectionSerializationEqualTester.class);
    testers.add(SetAddAllTester.class);
    testers.add(SetAddTester.class);
    testers.add(SetCreationTester.class);
    testers.add(SetHashCodeTester.class);
    testers.add(SetEqualsTester.class);
    testers.add(SetRemoveTester.class);
    // SetRemoveAllTester doesn't exist because, Sets not permitting

        streamsToClose?.closeQuietly()
      }
    }
  }

  internal class Message(
    val formatOpcode: Int,
    val data: ByteString,
  )

  internal class Close(
    val code: Int,
    val reason: ByteString?,
    val cancelAfterCloseMillis: Long,
  )

  abstract class Streams(
    val client: Boolean,
    val source: BufferedSource,
    val sink: BufferedSink,

                is CtMethod -> ktFile.isDocumentedAsSince(version, ctDeclaringClass, ctMember)
                else -> error("Unsupported japicmp member type '${member::class}'")
            }
        }
    }

    private
    fun KtFile.isDocumentedAsSince(version: String, declaringClass: CtClass, field: CtField): Boolean =