this.repositorySystem = requireNonNull(repositorySystem);
        this.scopeManager = new ScopeManagerImpl(Maven4ScopeManagerConfiguration.INSTANCE);
    }

    /**
     * Package protected constructor, only for use with {@link MavenRepositorySystemUtils}.
     */
    @Deprecated
    MavenSessionBuilderSupplier() {
        this.repositorySystem = null;

          triggerShutdown();
        }

        @Override
        public String toString() {
          return AbstractExecutionThreadService.this.toString();
        }
      };

  /** Constructor for use by subclasses. */
  protected AbstractExecutionThreadService() {}

  /**
   * Start the service. This method is invoked on the execution thread.
   *
   * <p>By default this method does nothing.
   */

   *
   * <p>To update this field correctly the lock must be held to guarantee that the state is
   * consistent.
   */
  private volatile StateSnapshot snapshot = new StateSnapshot(NEW);

  /** Constructor for use by subclasses. */
  protected AbstractService() {}

  /**
   * This method is called by {@link #startAsync} to initiate service startup. The invocation of

 * resulting {@code CharSink} will written to the {@code ByteSink} as encoded bytes.
 *
 * @since 14.0
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
public abstract class CharSink {

  /** Constructor for use by subclasses. */
  protected CharSink() {}

  /**
   * Opens a new {@link Writer} for writing to this sink. This method returns a new, independent
   * writer each time it is called.
   *

    @SuppressWarnings({"unchecked", "rawtypes"}) // needed for arrays
    public Collection<Integer>[] createValueArray(int length) {
      return new ImmutableSet[length];
    }
  }

  /**
   * Useless constructor for a class of static utility methods.
   *
   * @deprecated Do not instantiate this utility class.
   */
  @Deprecated
  public MapGenerators() {}

    @SuppressWarnings({"unchecked", "rawtypes"}) // needed for arrays
    public Collection<Integer>[] createValueArray(int length) {
      return new ImmutableSet[length];
    }
  }

  /**
   * Useless constructor for a class of static utility methods.
   *
   * @deprecated Do not instantiate this utility class.
   */
  @Deprecated
  public MapGenerators() {}

   * listeners} to each individual service.
   *
   * @author Luke Sandberg
   * @since 15.0 (present as an interface in 14.0)
   */
  public abstract static class Listener {
    /** Constructor for use by subclasses. */
    public Listener() {}

    /**
     * Called when the service initially becomes healthy.
     *

   * listeners} to each individual service.
   *
   * @author Luke Sandberg
   * @since 15.0 (present as an interface in 14.0)
   */
  public abstract static class Listener {
    /** Constructor for use by subclasses. */
    public Listener() {}

    /**
     * Called when the service initially becomes healthy.
     *

/**
 * Selects routes to connect to an origin server. Each connection requires a choice of proxy server,
 * IP address, and TLS mode. Connections may also be recycled.
 */
class RouteSelector internal constructor(
  private val address: Address,
  private val routeDatabase: RouteDatabase,
  private val call: RealCall,
  private val fastFallback: Boolean,
) {
  // State for negotiating the next proxy to use.

 *       <i>j</i><sup>th</sup> item in the <i>i</i><sup>th</sup> equality group, where both equality
 *       groups and the items within equality groups are numbered starting from 1. When either a
 *       constructor argument or an equal object is provided, that becomes group 1.
 * </ul>
 *
 * @author Jim McMaster
 * @author Jige Yu
 * @since 10.0
 */
@GwtCompatible
@NullMarked
public final class EqualsTester {