<description></description>
          <type>boolean</type>
          <defaultValue>false</defaultValue>
        </field>
        <field>
          <name>inheritedByDefault</name>
          <version>1.0.0+</version>
          <description></description>
          <type>boolean</type>
          <defaultValue>true</defaultValue>
        </field>
        <field>
          <name>requiredJavaVersion</name>

     * @param key The key to look up
     * @param defaultValue The default value to return if key doesn't exist or value is null
     * @return The string value, or defaultValue if not found
     */
    public static String getString(final Map<String, Object> map, final String key, final String defaultValue) {
        final Object value = map.get(key);
        if (value == null) {
            return defaultValue;
        }
        return value.toString();

      implements Function<K, V>, Serializable {
    final Map<K, ? extends V> map;
    @ParametricNullness final V defaultValue;

    ForMapWithDefault(Map<K, ? extends V> map, @ParametricNullness V defaultValue) {
      this.map = checkNotNull(map);
      this.defaultValue = defaultValue;
    }

    @Override
    @ParametricNullness
    public V apply(@ParametricNullness K key) {

      implements Function<K, V>, Serializable {
    final Map<K, ? extends V> map;
    @ParametricNullness final V defaultValue;

    ForMapWithDefault(Map<K, ? extends V> map, @ParametricNullness V defaultValue) {
      this.map = checkNotNull(map);
      this.defaultValue = defaultValue;
    }

    @Override
    @ParametricNullness
    public V apply(@ParametricNullness K key) {

        FessConfig fessConfig = new FessConfig.SimpleImpl() {
            @Override
            public String getSystemProperty(final String key, final String defaultValue) {
                return systemPropMap.getOrDefault(key, defaultValue);
            }
        };
        ComponentUtil.setFessConfig(fessConfig);
        SystemHelper systemHelper = new SystemHelper() {
            @Override

          <type>String</type>
          <defaultValue>default</defaultValue>
          <description>The layout of the mirror repository.
            @since Maven 3.</description>
        </field>
        <field>
          <name>mirrorOfLayouts</name>
          <version>1.1.0+</version>
          <type>String</type>
          <defaultValue>default,legacy</defaultValue>
          <description>

   * Returns the first element in {@code iterable} that satisfies the given predicate, or {@code
   * defaultValue} if none found. Note that this can usually be handled more naturally using {@code
   * tryFind(iterable, predicate).or(defaultValue)}.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code
   * stream.filter(predicate).findFirst().orElse(defaultValue)}
   *
   * @since 7.0
   */
  // The signature we really want here is...
  //

     * Maven installation configuration directory.
     *
     * @since 4.0.0
     */
    @Config(defaultValue = "${maven.home}/conf")
    public static final String MAVEN_INSTALLATION_CONF = "maven.installation.conf";

    /**
     * Maven user configuration directory.
     *
     * @since 4.0.0
     */
    @Config(defaultValue = "${user.home}/.m2")
    public static final String MAVEN_USER_CONF = "maven.user.conf";

    /**

        assertNull(dataStoreParams.getAsString("nonExistentKey"));
        assertEquals("defaultValue", dataStoreParams.getAsString("nonExistentKey", "defaultValue"));

        dataStoreParams.put("nullKey", null);
        assertEquals("defaultValue", dataStoreParams.getAsString("nullKey", "defaultValue"));
    }

        return getAs(key, defaultValue, s -> s);
    }

    /**
     * Retrieves a setting value as an int.
     * @param key The key of the setting.
     * @param defaultValue The default value if the setting is not found.
     * @return The setting value as an int.
     */
    public int getAsInt(final String key, final int defaultValue) {