* <code>null</code> if unknown.
     */
    public InputLocation getLocation(Object field);
    /**
     * Sets the location of the specified field.
     *
     * @param field The key of the field, must not be
     * <code>null</code>.
     * @param location The location of the field, may be
     * <code>null</code>.
     */
    public void setLocation(Object field, InputLocation location);

  @Override
  public SampleElements<String> samples() {
    return new Strings();
  }

  @Override
  public Multiset<String> create(Object... elements) {
    String[] array = new String[elements.length];
    int i = 0;
    for (Object e : elements) {
      array[i++] = (String) e;
    }
    return create(array);
  }

  protected abstract Multiset<String> create(String[] elements);

        this.unprefixedPathKeys = unprefixedPathKeys;
        this.projectDir = projectDir;
        this.pathTranslator = pathTranslator;
    }

    @Override
    public Object execute(String expression, Object value) {
        expression = ValueSourceUtils.trimPrefix(expression, expressionPrefixes, true);

        if (projectDir != null && value != null && unprefixedPathKeys.contains(expression)) {

  //             System.runFinalization();
  //         }
  //         System.exit(0);
  //     }

  //     public static TestSuite newTestSuite(Object... suiteOrClasses) {
  //         TestSuite suite = new TestSuite();
  //         for (Object suiteOrClass : suiteOrClasses) {
  //             if (suiteOrClass instanceof TestSuite)
  //                 suite.addTest((TestSuite) suiteOrClass);

        return attributes;
    }

    public void setAttributes(final Map<String, String> attributes) {
        this.attributes = attributes;
    }

    @Override
    public Map<String, Object> toSource() {
        final Map<String, Object> sourceMap = new HashMap<>();
        if (name != null) {
            sourceMap.put("name", name);
        }
        if (attributes != null) {
            sourceMap.putAll(attributes);
        }

     * のインスタンスかを検証されてしまうのでこれが必要。
     *
     * @param clazz
     *            期待するクラス
     * @return クラスをチェックする{@link Matcher}
     */
    public static Matcher<Object> sameClass(final Class<?> clazz) {
        return is((Object) clazz);
    }

 * asynchronously.
 *
 * <p>To attach to a {@link ListenableFuture} use {@link Futures#addCallback}.
 *
 * @author Anthony Zana
 * @since 10.0
 */
@GwtCompatible
public interface FutureCallback<V extends @Nullable Object> {
  /** Invoked with the result of the {@code Future} computation when it is successful. */
  void onSuccess(@ParametricNullness V result);

  /**
   * Invoked when a {@code Future} computation fails or is canceled.
   *

        "components": {
            "schemas": {
                "ValidationError": {
                    "title": "ValidationError",
                    "required": ["loc", "msg", "type"],
                    "type": "object",
                    "properties": {
                        "loc": {
                            "title": "Location",
                            "type": "array",
                            "items": {

        "components": {
            "schemas": {
                "ValidationError": {
                    "title": "ValidationError",
                    "required": ["loc", "msg", "type"],
                    "type": "object",
                    "properties": {
                        "loc": {
                            "title": "Location",
                            "type": "array",
                            "items": {

        "components": {
            "schemas": {
                "ValidationError": {
                    "title": "ValidationError",
                    "required": ["loc", "msg", "type"],
                    "type": "object",
                    "properties": {
                        "loc": {
                            "title": "Location",
                            "type": "array",
                            "items": {