import java.util.concurrent.locks.AbstractQueuedSynchronizer;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/** Utilities for the AbstractFutureBenchmarks */
@NullUnmarked
final class AbstractFutureBenchmarks {
  private AbstractFutureBenchmarks() {}

  interface Facade<T> extends ListenableFuture<T> {
    @CanIgnoreReturnValue
    boolean set(T t);

    @CanIgnoreReturnValue

import com.google.caliper.Param;
import com.google.caliper.api.Footprint;
import com.google.caliper.api.SkipThisScenarioException;
import com.google.common.util.concurrent.AbstractFutureBenchmarks.Facade;
import com.google.common.util.concurrent.AbstractFutureBenchmarks.Impl;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.Executor;
import org.jspecify.annotations.NullUnmarked;

import com.google.caliper.Param;
import com.google.caliper.api.Footprint;
import com.google.caliper.api.VmOptions;
import com.google.common.base.Preconditions;
import com.google.common.util.concurrent.AbstractFutureBenchmarks.OldAbstractFuture;
import com.google.errorprone.annotations.concurrent.GuardedBy;
import java.util.LinkedList;
import java.util.Queue;
import java.util.concurrent.ArrayBlockingQueue;