* false} for {@code boolean} and {@code '\0'} for {@code char}. For non-primitive types and
   * {@code void}, {@code null} is returned.
   */
  @SuppressWarnings("unchecked")
  @CheckForNull
  public static <T> T defaultValue(Class<T> type) {
    checkNotNull(type);
    if (type.isPrimitive()) {
      if (type == boolean.class) {
        return (T) Boolean.FALSE;
      } else if (type == char.class) {

    // We assume that all defaults are generics-safe, even if they aren't,
    // we take the risk.
    @SuppressWarnings("unchecked")
    T defaultValue = (T) defaults.getInstance(type.getRawType());
    if (defaultValue != null) {
      return defaultValue;
    }
    @SuppressWarnings("unchecked") // All arbitrary instances are generics-safe
    T arbitrary = (T) ArbitraryInstances.get(type.getRawType());

    }
    return value;
  }

  @Override
  @CheckForNull
  public V getOrDefault(@CheckForNull Object key, @CheckForNull V defaultValue) {
    V result = get(key);
    return (result != null) ? result : defaultValue;
  }

  V getOrLoad(K key) throws ExecutionException {
    return get(key, defaultLoader);
  }

  ImmutableMap<K, V> getAllPresent(Iterable<?> keys) {

    }
    return value;
  }

  @Override
  @CheckForNull
  public V getOrDefault(@CheckForNull Object key, @CheckForNull V defaultValue) {
    V result = get(key);
    return (result != null) ? result : defaultValue;
  }

  V getOrLoad(K key) throws ExecutionException {
    return get(key, defaultLoader);
  }

  ImmutableMap<K, V> getAllPresent(Iterable<?> keys) {