* @author Chris Povirk
 */
@NullUnmarked
final class InterruptionUtil {
  private static final Logger logger = Logger.getLogger(InterruptionUtil.class.getName());

  /** Runnable which will interrupt the target thread repeatedly when run. */
  private static final class Interruptenator implements Runnable {
    private final long everyMillis;
    private final Thread interruptee;
    private volatile boolean shouldStop = false;

import java.io.*;
import java.nio.channels.*;
import java.util.Properties;

public class MavenWrapperDownloader {

    private static final String WRAPPER_VERSION = "0.5.6";
    /**
     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
     */
    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"

    public void test_thread_safety() throws InterruptedException {
        // Test concurrent access to thread dump methods
        final AtomicInteger successCount = new AtomicInteger(0);
        final AtomicInteger errorCount = new AtomicInteger(0);
        final int threadCount = 10;
        final CountDownLatch latch = new CountDownLatch(threadCount);

        for (int i = 0; i < threadCount; i++) {
            new Thread(() -> {

     */
    public Deferred<T>.Promise execute(final Client client) {
        final String error = getValidationError();
        if (!Strings.isNullOrEmpty(error)) {
            throw new IllegalArgumentException(error);
        }

        final Deferred<T> deferred = new Deferred<>();
        try {
            processRequest(client, deferred);
        } catch (final Exception e) {
            throw new SuggesterException(e);

  }

  /** Runs sanity tests against return values of static factory methods declared by a class. */
  public final class FactoryMethodReturnValueTester {
    private final Set<String> packagesToTest = new HashSet<>();
    private final Class<?> declaringClass;
    private final ImmutableList<Invokable<?, ?>> factories;
    private final String factoryMethodsDescription;
    private Class<?> returnTypeToTest = Object.class;

   */
  public static <V> CacheLoader<Object, V> from(Supplier<V> supplier) {
    return new SupplierToCacheLoader<>(supplier);
  }

  private static final class FunctionToCacheLoader<K, V> extends CacheLoader<K, V>
      implements Serializable {
    private final Function<K, V> computingFunction;

    FunctionToCacheLoader(Function<K, V> computingFunction) {
      this.computingFunction = checkNotNull(computingFunction);
    }

    public static final WithPublicConstructorAndConstant INSTANCE =
        new WithPublicConstructorAndConstant();

    public WithPublicConstructorAndConstant() {}
  }

  private static class WithPublicConstants {
    @Keep public static final WithPublicConstants FIRST = new WithPublicConstants();

    // To test that we pick the first constant alphabetically

   *       key1=[A, B]&key2=C}.
   * </ul>
   *
   * @since 2.0
   */
  public static final class MapJoiner {
    private final Joiner joiner;
    private final String keyValueSeparator;

    private MapJoiner(Joiner joiner, String keyValueSeparator) {
      this.joiner = joiner; // only "this" is ever passed, so don't checkNotNull

     * @return an {@link Iterable} wrapping a {@link MultiIterator}
     */
    public static <E> Iterable<E> iterable(final Iterable<E>... iterables) {
        assertArgumentNotNull("iterables", iterables);

        @SuppressWarnings("unchecked")
        final Iterator<E>[] iterators = new Iterator[iterables.length];
        for (int i = 0; i < iterables.length; ++i) {

    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new GSA configuration exception with the specified detail message and cause.
     *
     * @param message the detail message describing the configuration error
     * @param cause the cause of the exception
     */
    public GsaConfigException(final String message, final Throwable cause) {
        super(message, cause);
    }