value = ReflectionValueExtractor.evaluate(pathExpression, session);
                    if (pathSeparator < expression.length() - 1) {
                        if (value instanceof Path) {
                            value = ((Path) value).resolve(expression.substring(pathSeparator + 1));
                        } else {
                            value = value + expression.substring(pathSeparator);

        if (rangeValue.value.isEmpty()) {
            return isLeft ? 1 : -1;
        }

        value = FILTER_1.matcher(value).replaceAll("");

        List<String> valueTokens = new ArrayList<>(Arrays.asList(FILTER_2.split(value)));
        List<String> rangeValueTokens = new ArrayList<>(Arrays.asList(FILTER_3.split(rangeValue.value)));

        addZeroTokens(valueTokens, 3);

        RecursionInterceptor recursionInterceptor = createRecursionInterceptor(request);
        return value -> {
            if (value != null && value.contains("${")) {
                String c = cache.get(value);
                if (c == null) {
                    try {
                        c = interpolator.interpolate(value, recursionInterceptor);
                    } catch (InterpolationException e) {

     */
    private static final String FAMILY_OS2 = "os/2";

    /**
     * OS family that can be tested for. {@value}
     */
    private static final String FAMILY_NETWARE = "netware";

    /**
     * OS family that can be tested for. {@value}
     */
    private static final String FAMILY_DOS = "dos";

    /**
     * OS family that can be tested for. {@value}
     */

        Xpp3Dom config = toConfig("<file>${test}</file>");

        BeanConfigurationValuePreprocessor preprocessor = (value, type) -> {
            if (value != null && value.startsWith("${") && value.endsWith("}")) {
                return value.substring(2, value.length() - 1);
            }
            return value;
        };

        BeanConfigurationPathTranslator translator = path -> new File("base", path.getPath()).getAbsoluteFile();

     * @param value the data to associate with the key, may be {@code null} to remove the mapping
     */
    <T> void set(@Nonnull Key<T> key, @Nullable T value);

    /**
     * Associates the specified session data with the given key if the key is currently mapped to the given value. This
     * method provides an atomic compare-and-update of some key's value.
     *

        private final String value;

        NamedImpl(String value) {
            this.value = value;
        }

        public String value() {
            return this.value;
        }

        @SuppressWarnings("checkstyle:MagicNumber")
        public int hashCode() {
            return 127 * "value".hashCode() ^ this.value.hashCode();
        }

            for (PlexusConfiguration ce : ces) {
                String value = ce.getValue(null);
                String defaultValue = ce.getAttribute("default-value", null);
                if (value != null || defaultValue != null) {
                    XmlNodeImpl e = new XmlNodeImpl(
                            ce.getName(),
                            value,

                    BuilderProblem.Severity.WARNING));
        }

        return new MavenToolchainsTransformer(value -> {
                    try {
                        return value != null ? interpolator.interpolate(value) : null;
                    } catch (InterpolationException e) {
                        problems.add(new DefaultBuilderProblem(
                                null,

            if (propValue.startsWith("!")) {
                reverseValue = true;
                propValue = propValue.substring(1);
            }

            // we have a value, so it has to match the system value...
            return reverseValue != propValue.equals(sysValue);
        } else {
            return reverseName != (sysValue != null && !sysValue.isEmpty());
        }
    }

    @Override