if _, ok := annotationRegistry[name]; !ok {
		return false, "", fmt.Errorf("no registered annotation with name=%s", name)
	}
	// use annotation value if present
	if val, found := annotations[annotationRegistry[name].key]; found {
		if err := annotationRegistry[name].validator(val); err != nil {
			return true, annotationRegistry[name].defaultVal, err
		}
		return true, val, nil

        unwantedFeatures.retainAll(features);
        logger.finer(
            Platform.format(
                "%s: skipping because these features are present: %s", method, unwantedFeatures));
      }
      return false;
    }
    return true;
  }

  private static boolean intersect(Set<?> a, Set<?> b) {
    return !disjoint(a, b);
  }

   * ClassValueValidator.
   *
   * Fortunately, we get pretty good coverage "by accident": We run all these tests against the
   * *backport*, where ClassValueValidator is not present.
   */

   */
  public static CharMatcher isNot(final char match) {
    return new IsNot(match);
  }

  /**
   * Returns a {@code char} matcher that matches any BMP character present in the given character
   * sequence. Returns a bogus matcher if the sequence contains supplementary characters.
   */
  public static CharMatcher anyOf(final CharSequence sequence) {
    switch (sequence.length()) {

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