}

    @Override
    Set<E> createElementSet() {
      return Sets.filter(unfiltered.elementSet(), predicate);
    }

    @Override
    Iterator<E> elementIterator() {
      throw new AssertionError("should never be called");
    }

    @Override
    Set<Entry<E>> createEntrySet() {
      return Sets.filter(
          unfiltered.entrySet(),
          new Predicate<Entry<E>>() {

    }

    @Override
    Set<E> createElementSet() {
      return Sets.filter(unfiltered.elementSet(), predicate);
    }

    @Override
    Iterator<E> elementIterator() {
      throw new AssertionError("should never be called");
    }

    @Override
    Set<Entry<E>> createEntrySet() {
      return Sets.filter(
          unfiltered.entrySet(),
          new Predicate<Entry<E>>() {

      this.hashFn = hashFn;
    }

    public MessageDigest getMessageDigest() {
      try {
        return MessageDigest.getInstance(algorithmName);
      } catch (NoSuchAlgorithmException e) {
        throw new AssertionError(e);
      }
    }

    public HashFunction getHashFunction() {
      return hashFn;
    }
  }

  // Use a constant seed for all of the benchmarks to ensure apples to apples comparisons.

      this.hashFn = hashFn;
    }

    public MessageDigest getMessageDigest() {
      try {
        return MessageDigest.getInstance(algorithmName);
      } catch (NoSuchAlgorithmException e) {
        throw new AssertionError(e);
      }
    }

    public HashFunction getHashFunction() {
      return hashFn;
    }
  }

  // Use a constant seed for all of the benchmarks to ensure apples to apples comparisons.

                          threadSum -= oldValue;
                        }
                        break;
                      default:
                        throw new AssertionError();
                    }
                  }
                  return threadSum;
                }
              }));
    }
    threadPool.shutdown();

  }

  private static MessageDigest getMessageDigest(String algorithmName) {
    try {
      return MessageDigest.getInstance(algorithmName);
    } catch (NoSuchAlgorithmException e) {
      throw new AssertionError(e);
    }
  }

  @Override
  public Hasher newHasher() {
    if (supportsClone) {
      try {
        return new MessageDigestHasher((MessageDigest) prototype.clone(), bytes);

      case STABLE:
        return new UndirectedGraphConnections<>(
            new LinkedHashMap<N, V>(INNER_CAPACITY, INNER_LOAD_FACTOR));
      default:
        throw new AssertionError(incidentEdgeOrder.type());
    }
  }

  static <N, V> UndirectedGraphConnections<N, V> ofImmutable(Map<N, V> adjacentNodeValues) {
    return new UndirectedGraphConnections<>(ImmutableMap.copyOf(adjacentNodeValues));

              @Override
              public void run() {
                try {
                  unit.sleep(time);
                } catch (InterruptedException wontHappen) {
                  throw new AssertionError(wontHappen);
                }
                interruptee.interrupt();
              }
            })
        .start();
  }

  static void repeatedlyInterruptTestThread(

      Method method = null;
      try {
        method = annotationClass.getMethod(propertyName);
      } catch (NoSuchMethodException e) {
        throw new AssertionError("Annotation is missing required method", e);
      }
      final Class<?> returnType = method.getReturnType();
      assertTrue(
          rootLocaleFormat("%s.%s() must return an array.", annotationClass, propertyName),

    } catch (InvocationTargetException e) {
      if (exception != e.getCause()) {
        throw new RuntimeException(e);
      }
    } catch (IllegalAccessException e) {
      throw new AssertionError(e);
    }
  }

  private static <T> void testEquals(
      Class<T> interfaceType, Function<? super T, ? extends T> wrapperFunction) {
    FreshValueGenerator generator = new FreshValueGenerator();