*
     * @param target The target object.
     * @return The URL string, or null if not found.
     */
    private String getUrl(final Object target) {
        final BeanDesc beanDesc = BeanDescFactory.getBeanDesc(target.getClass());
        final PropertyDesc sessionIdProp = beanDesc.getPropertyDesc(URL);
        final Object sessionId = sessionIdProp.getValue(target);
        return sessionId == null ? null : sessionId.toString();

            }
        } catch (final Throwable t) {
            throw new IllegalPropertyRuntimeException(beanDesc.getBeanClass(), propertyName, t);
        }
    }

    @Override
    public BeanDesc getBeanDesc() {
        return beanDesc;
    }

    @Override
    public final String toString() {
        final StringBuilder buf = new StringBuilder(256);
        buf.append("propertyName=")

                .setDefaultRequestConfig(requestConfigBuilder.build())
                .build();
        if (!httpClientPropertyMap.isEmpty()) {
            final BeanDesc beanDesc = BeanDescFactory.getBeanDesc(closeableHttpClient.getClass());
            for (final Map.Entry<String, Object> entry : httpClientPropertyMap.entrySet()) {
                final String propertyName = entry.getKey();