return;
        }

        for (final Map.Entry<String, PDComplexFileSpecification> ent : embeddedFileNames.entrySet()) {
            final PDComplexFileSpecification spec = ent.getValue();
            if (spec != null) {
                final PDEmbeddedFile embeddedFile = getEmbeddedFile(spec);
                extractFile(ent.getKey(), embeddedFile, writer);
            }
        }
    }

    /**

            putValue(data, "Received-Date", getReceivedDate(message));
            putValue(data, "Reply-To", message.getReplyTo());
            putValue(data, "Sender", message.getSender());
            putValue(data, "Sent-Date", message.getSentDate());
            putValue(data, "Size", message.getSize());
            putValue(data, "Subject", message.getSubject());
            putValue(data, "Receipients", message.getAllRecipients());

    @Resource
    protected MimeTypeHelper mimeTypeHelper;

    /** The HTTP client instance */
    protected volatile CloseableHttpClient httpClient;

    /** List of request headers to be sent with each request */
    private final List<Header> requestHeaderList = new ArrayList<>();

    /** Map of HTTP client properties */
    private final Map<String, Object> httpClientPropertyMap = new HashMap<>();