@Override
        public void call(Listener listener) {
          listener.stopped();
        }

        @Override
        public String toString() {
          return "stopped()";
        }
      };

  /**
   * A listener for the aggregate state changes of the services that are under management. Users
   * that need to listen to more fine-grained events (such as when each particular {@linkplain

              <location>${project.basedir}/javadoc-link/j2objc-annotations</location>
            </offlineLink>
            <!-- The JDK doc must be listed after JSR305 (and as an <offlineLink>, not a <link>) so that JSR305 "claims" javax.annotation. -->
            <offlineLink>
              <url>https://docs.oracle.com/javase/9/docs/api/</url>

   *     a provided list is null
   * @since 19.0
   */
  public static <B> List<List<B>> cartesianProduct(List<? extends List<? extends B>> lists) {
    return CartesianList.create(lists);
  }

  /**
   * Returns every possible list that can be formed by choosing one element from each of the given

import java.lang.annotation.Target;

/**
 * Disables Animal Sniffer's checking of compatibility with older versions of Java/Android.
 *
 * <p>Each package's copy of this annotation needs to be listed in our {@code pom.xml}.
 */
@Target({METHOD, CONSTRUCTOR, TYPE})
@ElementTypesAreNonnullByDefault

 * class was added for Java 8. The two classes are extremely similar, but incompatible (they cannot
 * share a common supertype). <i>All</i> known differences are listed either here or with the
 * relevant methods below.
 *
 * <ul>
 *   <li>This class is serializable; {@code java.util.Optional} is not.

      args.add(generateDummyArg(param, generator));
    }
    Object instance = createInstance(factory, args);
    List<Object> equalArgs = generateEqualFactoryArguments(factory, params, args);
    // Each group is a List of items, each item has a list of factory args.
    final List<List<List<Object>>> argGroups = Lists.newArrayList();
    argGroups.add(ImmutableList.of(args, equalArgs));
    EqualsTester tester =
        new EqualsTester(

    List<@Nullable Integer> list1 = Lists.newArrayList();
    List<@Nullable Integer> list2 = Lists.newArrayList(1);
    List<@Nullable Integer> list3 = Lists.newArrayList(1, 1);
    List<@Nullable Integer> list4 = Lists.newArrayList(1, 2);
    List<@Nullable Integer> list5 = Lists.newArrayList(1, null, 2);
    List<@Nullable Integer> list6 = Lists.newArrayList(2);

    List<@Nullable Integer> list1 = Lists.newArrayList();
    List<@Nullable Integer> list2 = Lists.newArrayList(1);
    List<@Nullable Integer> list3 = Lists.newArrayList(1, 1);
    List<@Nullable Integer> list4 = Lists.newArrayList(1, 2);
    List<@Nullable Integer> list5 = Lists.newArrayList(1, null, 2);
    List<@Nullable Integer> list6 = Lists.newArrayList(2);

import java.lang.annotation.Target;

/**
 * Disables Animal Sniffer's checking of compatibility with older versions of Java/Android.
 *
 * <p>Each package's copy of this annotation needs to be listed in our {@code pom.xml}.
 */
@Target({METHOD, CONSTRUCTOR, TYPE})
@ElementTypesAreNonnullByDefault

              <location>${project.basedir}/javadoc-link/j2objc-annotations</location>
            </offlineLink>
            <!-- The JDK doc must be listed after JSR305 (and as an <offlineLink>, not a <link>) so that JSR305 "claims" javax.annotation. -->
            <offlineLink>
              <url>https://docs.oracle.com/javase/9/docs/api/</url>