* leaks, by ensuring that objects are no longer strongly referenced:
 *
 * <pre>{@code
 * // Helper function keeps victim stack-unreachable.
 * private WeakReference<Foo> fooWeakRef() {
 *   Foo x = ....;
 *   WeakReference<Foo> weakRef = new WeakReference<>(x);
 *   // ... use x ...
 *   x = null;  // Hint to the JIT that x is stack-unreachable
 *   return weakRef;
 * }
 * public void testFooLeak() {

       * UnsignedBytesBenchmark. TODO(cpovirk): benchmark this
       */
      /*
       * A CopyOnWriteArraySet<WeakReference> is faster than a newSetFromMap of a MapMaker map with
       * weakKeys() and concurrencyLevel(1), even up to at least 12 cached exception types.
       */
      private static final Set<WeakReference<Class<? extends Exception>>> validClasses =
          new CopyOnWriteArraySet<>();

      @Override

    AtomicReference<Object> sepStopwatchA =
        new AtomicReference<Object>(sepStopwatchC.getMethod("createUnstarted").invoke(null));
    AtomicReference<WeakReference<?>> sepStopwatchRef =
        new AtomicReference<WeakReference<?>>(
            (WeakReference<?>) sepFwrCons.newInstance(sepStopwatchA.get(), sepFrqA.get()));
    assertNotNull(sepStopwatchA.get());
    // Clear all references to the Stopwatch and wait for it to be gc'd.

 * leaks, by ensuring that objects are no longer strongly referenced:
 *
 * <pre>{@code
 * // Helper function keeps victim stack-unreachable.
 * private WeakReference<Foo> fooWeakRef() {
 *   Foo x = ....;
 *   WeakReference<Foo> weakRef = new WeakReference<>(x);
 *   // ... use x ...
 *   x = null;  // Hint to the JIT that x is stack-unreachable
 *   return weakRef;
 * }
 * public void testFooLeak() {

import com.google.common.util.concurrent.FuturesGetCheckedInputs.TwoArgConstructorException;
import com.google.common.util.concurrent.FuturesGetCheckedInputs.TwoArgConstructorRuntimeException;
import java.lang.ref.WeakReference;
import java.net.URLClassLoader;
import java.util.concurrent.CancellationException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeoutException;
import junit.framework.TestCase;

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.model.interpolation.reflection;

import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import java.lang.reflect.Array;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Optional;

  @GwtIncompatible
  @J2ObjCIncompatible // gc
  @AndroidIncompatible
  public void testCancellationWithReferencedObject() throws Exception {
    Object toBeGCed = new Object();
    WeakReference<Object> ref = new WeakReference<>(toBeGCed);
    final SettableFuture<@Nullable Void> settableFuture = SettableFuture.create();
    ListenableFuture<?> ignored =
        serializer.submitAsync(

  @GwtIncompatible
  @J2ObjCIncompatible // gc
  @AndroidIncompatible
  public void testCancellationWithReferencedObject() throws Exception {
    Object toBeGCed = new Object();
    WeakReference<Object> ref = new WeakReference<>(toBeGCed);
    final SettableFuture<@Nullable Void> settableFuture = SettableFuture.create();
    ListenableFuture<?> ignored =
        serializer.submitAsync(

      copy = ImmutableList.<Service>of(new NoOpService());
    }
    this.state = new ServiceManagerState(copy);
    this.services = copy;
    WeakReference<ServiceManagerState> stateReference = new WeakReference<>(state);
    for (Service service : copy) {
      service.addListener(new ServiceListener(service, stateReference), directExecutor());

      copy = ImmutableList.<Service>of(new NoOpService());
    }
    this.state = new ServiceManagerState(copy);
    this.services = copy;
    WeakReference<ServiceManagerState> stateReference = new WeakReference<>(state);
    for (Service service : copy) {
      service.addListener(new ServiceListener(service, stateReference), directExecutor());