if (fileSpec instanceof final PDComplexFileSpecification complexFileSpec) {
                            final PDEmbeddedFile embeddedFile = getEmbeddedFile(complexFileSpec);
                            extractFile(complexFileSpec.getFilename(), embeddedFile, writer);
                        }
                    }
                }
            } catch (final IOException e) {

    }

    /**
     * Extracts the URL string from a crawler object for logging purposes.
     *
     * @param keyObj the crawler object to extract URL from
     * @return the URL string or a default value if not extractable
     */
    protected String getUrl(final Object keyObj) {
        if (keyObj instanceof final UrlQueue<?> urlQueue) {
            return escapeValue(urlQueue.getUrl());
        }