checkNotNull(runnable, "Runnable was null.");
    checkNotNull(executor, "Executor was null.");

    // Lock while we check state. We must maintain the lock while adding the new pair so that
    // another thread can't run the list out from under us. We only add to the list if we have not
    // yet started execution.
    synchronized (this) {
      if (!executed) {

        assertNotNull(unwrapped, "unwrap to CredentialsInternal returns instance");
        assertSame(creds, unwrapped, "unwrap returns the same object instance");

        // unwrap to unrelated type should return null (use another Credentials implementation)
        assertNull(creds.unwrap(NtlmPasswordAuthenticator.class), "unwrap to unrelated type returns null");

        // domain and flags are surfaced as given

import java.util.Comparator;
import java.util.Iterator;
import java.util.NavigableSet;
import org.jspecify.annotations.Nullable;

/**
 * A sorted multiset which forwards all its method calls to another sorted multiset. Subclasses
 * should override one or more methods to modify the behavior of the backing multiset as desired per
 * the <a href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *

   */
  // TODO(cpovirk): Consider documenting that IAE on the various methods that can throw it.
  RangeMap<K, V> subRangeMap(Range<K> range);

  /**
   * Returns {@code true} if {@code obj} is another {@code RangeMap} that has an equivalent {@link
   * #asMapOfRanges()}.
   */
  @Override
  boolean equals(@Nullable Object o);

  /** Returns {@code asMapOfRanges().hashCode()}. */
  @Override

                || MODEL_VERSION_4_1_0.equals(modelVersion)
                || MODEL_VERSION_4_2_0.equals(modelVersion);
    }

    /**
     * Checks if an upgrade from one version to another is possible.
     *
     * @param fromVersion the source version
     * @param toVersion the target version
     * @return true if the upgrade is possible
     */

 *  Upgrade: [publicsuffix.org data][public_suffix]. This powers `HttpUrl.topPrivateDomain()`.
    It's also how OkHttp knows which domains can share cookies with one another.
 *  Upgrade: [Okio 3.2.0][okio_3_2_0].


## Version 4.10.0

_2022-06-12_

 *  Upgrade: [Kotlin 1.6.20][kotlin_1_6_20].
 *  Upgrade: [Okio 3.0.0][okio_3_0_0].

// ChecksumType contains information about the checksum type.
type ChecksumType uint32

const (

	// ChecksumTrailing indicates the checksum will be sent in the trailing header.
	// Another checksum type will be set.
	ChecksumTrailing ChecksumType = 1 << iota

	// ChecksumSHA256 indicates a SHA256 checksum.
	ChecksumSHA256
	// ChecksumSHA1 indicates a SHA-1 checksum.
	ChecksumSHA1

    nextTask.start()
    return nextTask
  }

  private interface SerialTask {
    /** Returns true if this task is ready to start. */
    fun isReady() = true

    /** Do this task's work, and then start another, such as by calling [startNextTask]. */
    fun start()
  }

  private object TestThreadSerialTask : SerialTask {
    override fun start() = error("unexpected call")
  }

  inner class RunnableSerialTask(

   *       according to the definition of the equivalence. The hash need not remain consistent from
   *       one execution of an application to another execution of the same application.
   *   <li>It is <i>distributable across equivalence</i>: for any references {@code x} and {@code
   *       y}, if {@code equivalent(x, y)}, then {@code hash(x) == hash(y)}. It is <i>not</i>

import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.maven.execution.ProjectDependencyGraph;
import org.apache.maven.project.MavenProject;

/**
 * Provides a sub view of another dependency graph.
 *
 */
class FilteredProjectDependencyGraph implements ProjectDependencyGraph {

    private final ProjectDependencyGraph projectDependencyGraph;

    private final Map<MavenProject, ?> whiteList;