listeners.dispatch();
    }

    @GuardedBy("monitor")
    void checkHealthy() {
      if (states.count(RUNNING) != numberOfServices) {
        IllegalStateException exception =
            new IllegalStateException(
                "Expected to be healthy after starting. The following services are not running: "
                    + Multimaps.filterKeys(servicesByState, not(equalTo(RUNNING))));

      listeners.dispatch();
    }

    @GuardedBy("monitor")
    void checkHealthy() {
      if (states.count(RUNNING) != numberOfServices) {
        IllegalStateException exception =
            new IllegalStateException(
                "Expected to be healthy after starting. The following services are not running: "
                    + Multimaps.filterKeys(servicesByState, not(equalTo(RUNNING))));

    }


    @Override
    public Object clone () {
        try {
            return new HMACT64(this);
        }
        catch ( CloneNotSupportedException ex ) {
            throw new IllegalStateException(ex.getMessage());
        }
    }


    @Override
    protected byte[] engineDigest () {
        byte[] digest = this.md5.digest();
        this.md5.update(this.opad);

  }

  @Test fun nullInterceptorInList() {
    val builder = OkHttpClient.Builder()
    builder.interceptors().addAll(listOf(null) as List<Interceptor>)
    assertFailsWith<IllegalStateException> {
      builder.build()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Null interceptor: [null]")
    }
  }

  @Test fun nullNetworkInterceptorInList() {

        + allowsSelfLoops()
        + ", nodes: "
        + nodes()
        + ", edges: "
        + edgeIncidentNodesMap(this);
  }

  /**
   * Returns a {@link Set} whose methods throw {@link IllegalStateException} when the given edge is
   * not present in this network.
   *
   * @since 33.1.0
   */
  protected final <T> Set<T> edgeInvalidatableSet(Set<T> set, E edge) {
    return InvalidatableSet.of(

    SomeUncheckedException sue = new SomeUncheckedException();
    IllegalArgumentException iae = new IllegalArgumentException(sue);
    RuntimeException re = new RuntimeException(iae);
    IllegalStateException ex = new IllegalStateException(re);

    assertThat(getCausalChain(ex)).containsExactly(ex, re, iae, sue).inOrder();
    assertSame(sue, Iterables.getOnlyElement(getCausalChain(sue)));

        + allowsSelfLoops()
        + ", nodes: "
        + nodes()
        + ", edges: "
        + edgeIncidentNodesMap(this);
  }

  /**
   * Returns a {@link Set} whose methods throw {@link IllegalStateException} when the given edge is
   * not present in this network.
   *
   * @since 33.1.0
   */
  protected final <T> Set<T> edgeInvalidatableSet(Set<T> set, E edge) {
    return InvalidatableSet.of(

          .put(ExecutionException.class, e -> e instanceof ExecutionException)
          .put(IllegalArgumentException.class, e -> e instanceof IllegalArgumentException)
          .put(IllegalStateException.class, e -> e instanceof IllegalStateException)
          .put(IndexOutOfBoundsException.class, e -> e instanceof IndexOutOfBoundsException)
          .put(NoSuchElementException.class, e -> e instanceof NoSuchElementException)

          .put(ExecutionException.class, e -> e instanceof ExecutionException)
          .put(IllegalArgumentException.class, e -> e instanceof IllegalArgumentException)
          .put(IllegalStateException.class, e -> e instanceof IllegalStateException)
          .put(IndexOutOfBoundsException.class, e -> e instanceof IndexOutOfBoundsException)
          .put(NoSuchElementException.class, e -> e instanceof NoSuchElementException)

  /**
   * {@inheritDoc}
   *
   * <p>Implementations may or may not support removal when a call to {@link #peek()} has occurred
   * since the most recent call to {@link #next()}.
   *
   * @throws IllegalStateException if there has been a call to {@link #peek()} since the most recent
   *     call to {@link #next()} and this implementation does not support this sequence of calls
   *     (optional)
   */
  @Override
  void remove();