*
     * @param <E>
     *            {@link ArrayList}の要素型
     * @param initialCapacity
     *            リストの初期容量
     * @return {@link ArrayList}の新しいインスタンス
     * @see ArrayList#ArrayList(int)
     */
    public static <E> ArrayList<E> newArrayList(final int initialCapacity) {
        return new ArrayList<>(initialCapacity);
    }

    /**
     * {@link ConcurrentHashMap}の新しいインスタンスを作成して返します。
     *

   *
   * @throws IllegalArgumentException if {@code initialCapacity} is negative
   * @throws IllegalStateException if an initial capacity was already set
   */
  @CanIgnoreReturnValue
  public MapMaker initialCapacity(int initialCapacity) {
    checkState(
        this.initialCapacity == UNSET_INT,
        "initial capacity was already set to %s",
        this.initialCapacity);
    checkArgument(initialCapacity >= 0);

        CacheBuilder.newBuilder().initialCapacity(10), CacheBuilder.from(spec));
  }

  public void testParse_initialCapacityRepeated() {
    assertThrows(
        IllegalArgumentException.class, () -> parse("initialCapacity=10, initialCapacity=20"));
  }

  public void testParse_maximumSize() {
    CacheBuilderSpec spec = parse("maximumSize=9000");
    assertNull(spec.initialCapacity);

      }
    }
  }

  /** Parse initialCapacity */
  static class InitialCapacityParser extends IntegerParser {
    @Override
    protected void parseInteger(CacheBuilderSpec spec, int value) {
      checkArgument(
          spec.initialCapacity == null,
          "initial capacity was already set to %s",
          spec.initialCapacity);
      spec.initialCapacity = value;
    }
  }

 */
@ElementTypesAreNonnullByDefault
public final class MapMaker {
  private int initialCapacity = 16;

  public MapMaker() {}

  @CanIgnoreReturnValue
  public MapMaker initialCapacity(int initialCapacity) {
    if (initialCapacity < 0) {
      throw new IllegalArgumentException();
    }
    this.initialCapacity = initialCapacity;
    return this;
  }

  @CanIgnoreReturnValue

    MapMaker maker = new MapMaker();
    try {
      maker.initialCapacity(-1);
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }

  // TODO(cpovirk): enable when ready (apparently after a change to our GWT emulation)
  public void xtestInitialCapacity_setTwice() {
    MapMaker maker = new MapMaker().initialCapacity(16);
    try {
      // even to the same value is not allowed

        CacheBuilder.newBuilder().initialCapacity(10), CacheBuilder.from(spec));
  }

  public void testParse_initialCapacityRepeated() {
    assertThrows(
        IllegalArgumentException.class, () -> parse("initialCapacity=10, initialCapacity=20"));
  }

  public void testParse_maximumSize() {
    CacheBuilderSpec spec = parse("maximumSize=9000");
    assertNull(spec.initialCapacity);

        addAll(c);
    }

    /**
     * {@link CaseInsensitiveSet}を作成します。
     *
     * @param initialCapacity
     *            初期容量
     */
    public CaseInsensitiveSet(final int initialCapacity) {
        map = new CaseInsensitiveMap<>(initialCapacity);
    }

    @Override
    public Iterator<String> iterator() {
        return map.keySet().iterator();
    }

    @Override

    MapMaker maker = new MapMaker();
    try {
      maker.initialCapacity(-1);
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }

  // TODO(cpovirk): enable when ready (apparently after a change to our GWT emulation)
  public void xtestInitialCapacity_setTwice() {
    MapMaker maker = new MapMaker().initialCapacity(16);
    try {
      // even to the same value is not allowed

      }
    }
  }

  /** Parse initialCapacity */
  static class InitialCapacityParser extends IntegerParser {
    @Override
    protected void parseInteger(CacheBuilderSpec spec, int value) {
      checkArgument(
          spec.initialCapacity == null,
          "initial capacity was already set to %s",
          spec.initialCapacity);
      spec.initialCapacity = value;
    }
  }