* accessed by instances of {@link ServiceListener}.
   */
  private static final class ServiceManagerState {
    final Monitor monitor = new Monitor();

    @GuardedBy("monitor")
    final SetMultimap<State, Service> servicesByState =
        MultimapBuilder.enumKeys(State.class).linkedHashSetValues().build();

    @GuardedBy("monitor")
    final Multiset<State> states = servicesByState.keys();

    @GuardedBy("monitor")

 * the order of magnitude of the generated values uniformly at random.
 *
 * @author Louis Wasserman
 */
@NullUnmarked
final class MathBenchmarking {
  static final int ARRAY_SIZE = 0x10000;
  static final int ARRAY_MASK = 0x0ffff;
  static final Random RANDOM_SOURCE = new Random(314159265358979L);
  static final int MAX_EXPONENT = 100;

  /*
   * Duplicated from LongMath.
   * binomial(biggestBinomials[k], k) fits in a long, but not

  @Override
  public int hashCode() {
    return Sets.hashCodeImpl(this);
  }

  @GwtIncompatible
  @J2ktIncompatible
  private static final class SerializedForm<C extends Comparable> implements Serializable {
    final Range<C> range;
    final DiscreteDomain<C> domain;

    private SerializedForm(Range<C> range, DiscreteDomain<C> domain) {
      this.range = range;
      this.domain = domain;
    }

        when(parentLocator.isWorkgroup()).thenReturn(true);
    }

    /** Simple implementation of FileEntry for controlled inputs in tests. */
    private static final class StubFileEntry implements FileEntry {
        private final String name;
        private final int type;

        StubFileEntry(String name, int type) {
            this.name = name;
            this.type = type;
        }

        @Override

    return new StringConverter(this, targetFormat);
  }

  private static final class StringConverter extends Converter<String, String>
      implements Serializable {

    private final CaseFormat sourceFormat;
    private final CaseFormat targetFormat;

    StringConverter(CaseFormat sourceFormat, CaseFormat targetFormat) {

@RunWith(Parameterized.class)
@NullUnmarked
public final class GraphEquivalenceTest {
  private static final Integer N1 = 1;
  private static final Integer N2 = 2;
  private static final Integer N3 = 3;

  private final EdgeType edgeType;
  private final MutableGraph<Integer> graph;

  // add parameters: directed/undirected
  @Parameters

@RunWith(Parameterized.class)
@NullUnmarked
public final class GraphEquivalenceTest {
  private static final Integer N1 = 1;
  private static final Integer N2 = 2;
  private static final Integer N3 = 3;

  private final EdgeType edgeType;
  private final MutableGraph<Integer> graph;

  // add parameters: directed/undirected
  @Parameters

     */
    public String execute() {
        try {
            final long count = ComponentUtil.getThumbnailManager().purge(getExpiry());
            return "Deleted " + count + " thumbnail files.";
        } catch (final Exception e) {
            logger.error("Failed to purge thumbnails.", e);
            return e.getMessage();
        }
    }

    /**

@GwtCompatible
@SuppressWarnings("serial") // uses writeReplace(), not default serialization
final class RegularImmutableList<E> extends ImmutableList<E> {
  static final ImmutableList<Object> EMPTY = new RegularImmutableList<>(new Object[0], 0);

  // The first `size` elements are non-null.
  @VisibleForTesting final transient @Nullable Object[] array;
  private final transient int size;

  RegularImmutableList(@Nullable Object[] array, int size) {

  static ImmutableSet<Class<?>> flattenHierarchy(Class<?> concreteClass) {
    return flattenHierarchyCache.getUnchecked(concreteClass);
  }

  private static final class MethodIdentifier {

    private final String name;
    private final List<Class<?>> parameterTypes;

    MethodIdentifier(Method method) {
      this.name = method.getName();
      this.parameterTypes = Arrays.asList(method.getParameterTypes());