private final int[][] intsToMul = new int[ARRAY_SIZE][2];
  private final long[][] longsToAdd = new long[ARRAY_SIZE][2];
  private final long[][] longsToMul = new long[ARRAY_SIZE][2];

  @Param({"APACHE", "GUAVA"})
  Impl impl;

  @BeforeExperiment
  void setUp() {
    for (int i = 0; i < ARRAY_SIZE; i++) {
      factorials[i] = RANDOM_SOURCE.nextInt(200);
      for (int j = 0; j < 2; j++) {

    };

    abstract ExecutionListWrapper newExecutionList();
  }

  private ThreadPoolExecutor executorService;
  private CountDownLatch listenerLatch;
  private ExecutionListWrapper list;

  @Param Impl impl;

  @Param({"1", "5", "10"})
  int numListeners;

  private final Runnable listener =
      new Runnable() {
        @Override
        public void run() {
          listenerLatch.countDown();

    DefaultToolchainManagerV4 v4Manager() {
        return new DefaultToolchainManagerV4();
    }

    private org.apache.maven.impl.DefaultToolchainManager getDelegate() {
        return getToolchainManager(lookup, logger);
    }

    private org.apache.maven.impl.DefaultToolchainManager getToolchainManager(Lookup lookup, Logger logger) {
        return getToolchainManager(

        // Arrange: create an implementation instance
        SmbRenewableCredentials impl = supplier.get();

        // Act: call renew
        CredentialsInternal renewed = impl.renew();

        // Assert: verify behavior based on scenario
        if (expectSame) {
            assertSame(impl, renewed, "renew() should return the same instance");
        } else if (expectNew) {

import org.apache.maven.execution.MavenSession;
import org.apache.maven.impl.InternalSession;
import org.apache.maven.impl.resolver.scopes.Maven4ScopeManagerConfiguration;
import org.apache.maven.internal.impl.DefaultLookup;
import org.apache.maven.internal.impl.DefaultSession;
import org.apache.maven.internal.impl.InternalMavenSession;
import org.apache.maven.model.building.ModelBuildingException;

     * @return a new filtered problem collector instance
     */
    @Nonnull
    static <P extends BuilderProblem> ProblemCollector<P> create(int maxCountLimit, Predicate<? super P> filter) {
        return new Impl<>(maxCountLimit, filter);
    }

    /**
     * Creates new instance of problem collector with the specified maximum problem count limit.
     * Visible for testing only.
     *

       */
      copyIfNecessary();
      this.impl = this.impl.combine(other.impl);
      return this;
    }

    @Override
    public ImmutableSet<E> build() {
      requireNonNull(impl); // see the comment on the field
      forceCopy = true;
      impl = impl.review();
      return impl.build();
    }
  }

                  @SuppressWarnings({"unchecked", "rawtypes"})
                  public Map<Class, Impl> create(Object... elements) {
                    MutableClassToInstanceMap<Impl> map = MutableClassToInstanceMap.create();
                    for (Object object : elements) {
                      Entry<Class, Impl> entry = (Entry<Class, Impl>) object;
                      map.putInstance(entry.getKey(), entry.getValue());
                    }

  enum State {
    NOT_DONE,
    FINISHED,
    CANCELLED,
    FAILED
  }

  @Param State state;
  @Param Impl impl;

  @Param({"0", "1", "5", "10"})
  int numListeners;

  @Param({"0", "1", "5", "10"})
  int numThreads;

  private final Set<Thread> blockedThreads = new HashSet<>();

  @BeforeExperiment
  void setUp() throws Exception {

import org.eclipse.aether.internal.impl.SimpleLocalRepositoryManagerFactory;
import org.eclipse.aether.internal.impl.scope.ManagedDependencyContextRefiner;
import org.eclipse.aether.internal.impl.scope.ManagedScopeDeriver;
import org.eclipse.aether.internal.impl.scope.ManagedScopeSelector;
import org.eclipse.aether.internal.impl.scope.OptionalDependencySelector;
import org.eclipse.aether.internal.impl.scope.ScopeDependencySelector;