return Constants.TRUE.equalsIgnoreCase(getSystemProperty(key, defaultValue ? Constants.TRUE : Constants.FALSE));
    }

    default void setSystemPropertyAsBoolean(final String key, final boolean value) {
        setSystemProperty(key, value ? Constants.TRUE : Constants.FALSE);
    }

        String httpAddress = SystemUtil.getSearchEngineHttpAddress();
        if (StringUtil.isBlank(httpAddress) && (runner == null)) {
            switch (fessConfig.getFesenType()) {
            case Constants.FESEN_TYPE_CLOUD:
            case Constants.FESEN_TYPE_AWS:
                httpAddress = org.codelibs.fess.util.ResourceUtil.getFesenHttpUrl();
                break;
            default:
                runner = new OpenSearchRunner();

            return;
        }

        final StringBuilder buf = new StringBuilder(1000);
        request.setAttribute(Constants.SEARCH_LOG_ACCESS_TYPE, Constants.SEARCH_LOG_ACCESS_TYPE_JSON);
        final JsonRequestParams params = new JsonRequestParams(request, fessConfig);
        try {
            response.setContentType("application/x-ndjson; charset=UTF-8");

                                groupList.add(Base64.getUrlEncoder().encodeToString(name.getBytes(Constants.CHARSET_UTF_8)));
                            } else if (lowerEntryDn.indexOf(lowerRoleDn) != -1) {
                                roleList.add(Base64.getUrlEncoder().encodeToString(name.getBytes(Constants.CHARSET_UTF_8)));
                            }
                        });

   * operates per-segment rather than globally for increased implementation simplicity. We expect
   * the cache hit rate to be similar to that of a global LRU algorithm.
   */

  // Constants

  /**
   * The maximum capacity, used if a higher value is implicitly specified by either of the
   * constructors with arguments. MUST be a power of two no greater than {@code 1<<30} to ensure

      this.exception = checkNotNull(exception);
    }
  }

  /** A special value to represent cancellation and the 'wasInterrupted' bit. */
  private static final class Cancellation {
    // constants to use when GENERATE_CANCELLATION_CAUSES = false
    @CheckForNull static final Cancellation CAUSELESS_INTERRUPTED;
    @CheckForNull static final Cancellation CAUSELESS_CANCELLED;

    static {

   *                            8
   */

  // Constant matcher factory methods

  /**
   * Matches any character.
   *
   * @since 19.0 (since 1.0 as constant {@code ANY})
   */
  public static CharMatcher any() {
    return Any.INSTANCE;
  }

  /**
   * Matches no characters.
   *
   * @since 19.0 (since 1.0 as constant {@code NONE})
   */
  public static CharMatcher none() {

                    problems.add(
                            Severity.FATAL,
                            ModelProblem.Version.V31,
                            "Version must be a constant",
                            childModel.getLocation(""));

                } else {
                    if (rawChildVersionReferencesParent(rawChildModelVersion)) {

   * is merely copied. Only as the power set is iterated are the individual subsets created, and
   * these subsets themselves occupy only a small constant amount of memory.
   *
   * @param set the set of elements to construct a power set from
   * @return the power set, as an immutable set of immutable sets

        this.artifacts = artifacts;

        // flush the calculated artifactMap
        artifactMap = null;
    }

    /**
     * All dependencies that this project has, including transitive ones. Contents are lazily populated, so depending on
     * what phases have run dependencies in some scopes won't be included. e.g. if only compile phase has run,
     * dependencies with scope test won't be included.
     *