* <p>Example usage:</p>
 * <pre>
 *     RequestHeader header = new RequestHeader("Content-Type", "application/json");
 *     String name = header.getName();
 *     String value = header.getValue();
 *     boolean isValid = header.isValid();
 * </pre>
 *
 * <p>Note: The name should not be blank and the value should not be null for the header to be considered valid.</p>
 *
 * @see java.io.Serializable
 */

            try (final InputStream is = responseData.getResponseBody()) {
                final SitemapsHelper sitemapsHelper = crawlerContainer.getComponent("sitemapsHelper");
                return sitemapsHelper.isValid(is);
            } catch (final CrawlingAccessException e) {
                throw e;
            } catch (final Exception e) {
                if (logger.isDebugEnabled()) {