* only meant as a utility for developers that want to employ the model builder outside of the Maven build system, Maven
 * plugins should always acquire model builder instances via dependency injection. Developers might want to subclass
 * this factory to provide custom implementations for some of the components used by the model builder.
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")

   *
   * <p>In many cases, you may wish to override {@link ForwardingNavigableSet#descendingSet} to
   * forward to this implementation or a subclass thereof.
   *
   * @since 12.0
   */
  protected class StandardDescendingSet extends Sets.DescendingSet<E> {
    /** Constructor for use by subclasses. */
    public StandardDescendingSet() {
      super(ForwardingNavigableSet.this);
    }
  }

  @Override

        }

        return request;
    }

    // layer the creation of a project builder configuration with a request, but this will need to be
    // a Maven subclass because we don't want to couple maven to the project builder which we need to
    // separate.
    protected MavenSession createMavenSession(File pom) throws Exception {
        return createMavenSession(pom, new Properties());

   *
   * @since 2.0
   */
  public static class Builder<E> extends ImmutableCollection.Builder<E> {
    /*
     * `contents` is null only for instances of the subclass, ImmutableSortedMultiset.Builder. That
     * subclass overrides all the methods that access it here. Thus, all the methods here can safely
     * assume that this field is non-null.
     */
    @Nullable ObjectCountHashMap<E> contents;

abstract class TreeTraverser<T> {
  /** Constructor for use by subclasses. */
  public TreeTraverser() {}

  /**
   * Returns a tree traverser that uses the given function to navigate from a node to its children.
   * This is useful if the function instance already exists, or so that you can supply a lambda
   * expressions. If those circumstances don't apply, you probably don't need to use this; subclass

 * <i>chaining</i>, and <i>using</i>.
 *
 * <h4>Acquiring</h4>
 *
 * <p>The common ways to get an instance of {@code Ordering} are:
 *
 * <ul>
 *   <li>Subclass it and implement {@link #compare} instead of implementing {@link Comparator}
 *       directly
 *   <li>Pass a <i>pre-existing</i> {@link Comparator} instance to {@link #from(Comparator)}

        // to create the stream handler for the connection.
        URLStreamHandlerFactory mockFactory = mock(URLStreamHandlerFactory.class);

        // Create a concrete URLStreamHandler subclass instead of mocking
        URLStreamHandler mockStreamHandler = new URLStreamHandler() {
            @Override
            protected URLConnection openConnection(URL u) throws IOException {

    assertThat(future.isDone()).isFalse();
    assertThat(future.set(1)).isTrue();
    assertSuccessful(future, 1);
  }

  /** Concrete subclass for testing. */
  private static class TestedFuture<V extends @Nullable Object> extends AbstractFuture<V> {
    private static <V extends @Nullable Object> TestedFuture<V> create() {
      return new TestedFuture<V>();
    }

      if (result) {
        executionList.execute();
      }
      return result;
    }

    /**
     * Following the contract of {@link AbstractQueuedSynchronizer} we create a private subclass to
     * hold the synchronizer. This synchronizer is used to implement the blocking and waiting calls
     * as well as to handle state changes in a thread-safe manner. The current state of the future

   * elements and to build again.
   *
   * @since 2.0
   */
  public static class Builder<E> extends ImmutableCollection.Builder<E> {
    /*
     * `impl` is null only for instances of the subclass, ImmutableSortedSet.Builder. That subclass
     * overrides all the methods that access it here. Thus, all the methods here can safely assume
     * that this field is non-null.
     */
    private @Nullable SetBuilderImpl<E> impl;