/**
     * Gets the optional preprocessor for configuration values.
     *
     * @return The preprocessor for configuration values or {@code null} if none.
     */
    BeanConfigurationValuePreprocessor getValuePreprocessor();

    /**
     * Sets the optional preprocessor for configuration values.
     *
     * @param valuePreprocessor The preprocessor for configuration values, may be {@code null} if unneeded.

    public DefaultBeanConfigurationRequest setClassLoader(ClassLoader classLoader) {
        this.classLoader = classLoader;
        return this;
    }

    public BeanConfigurationValuePreprocessor getValuePreprocessor() {
        return valuePreprocessor;
    }

    public DefaultBeanConfigurationRequest setValuePreprocessor(BeanConfigurationValuePreprocessor valuePreprocessor) {

        private final BeanConfigurationPathTranslator translator;

        BeanExpressionEvaluator(BeanConfigurationRequest request) {
            preprocessor = request.getValuePreprocessor();
            translator = request.getPathTranslator();
        }

        public Object evaluate(String expression, Class<?> type) throws ExpressionEvaluationException {
            if (preprocessor != null) {