CrawlerSystemException exception1 = new CrawlerSystemException(exceptionCause);
        assertSame(exceptionCause, exception1.getCause());

        // With Error cause
        Error errorCause = new Error("Error cause");
        CrawlerSystemException exception2 = new CrawlerSystemException(errorCause);
        assertSame(errorCause, exception2.getCause());

        // With RuntimeException cause

    }

    /**
     * Processes system error log events.
     *
     * @param objs the log objects (should contain a Throwable)
     */
    protected void processSystemError(final Object... objs) {
        final Throwable t = (Throwable) objs[0];
        if (logger.isErrorEnabled()) {
            logger.error("System Error.", t);
        }
    }

    /**

    }

    /**
     * Detects the MIME type of the content.
     *
     * @param out the deferred file output stream
     * @return the detected MIME type
     * @throws IOException if an I/O error occurs
     */
    protected String getMimeType(final DeferredFileOutputStream out) throws IOException {
        final MimeTypeHelper mimeTypeHelper = crawlerContainer.getComponent("mimeTypeHelper");

         * @throws ErrorResponseException If the server returns an error
         * @throws IllegalArgumentException If the arguments are invalid
         * @throws InsufficientDataException If insufficient data is available
         * @throws InternalException If an internal error occurs
         * @throws InvalidResponseException If the response is invalid

    /**
     * Checks if a bucket exists in the object storage.
     * @param name the name of the bucket to check
     * @return true if the bucket exists, false otherwise
     * @throws CrawlingAccessException if an error occurs while checking bucket existence
     */
    protected boolean bucketExists(final String name) {
        try {
            final BucketExistsArgs args = BucketExistsArgs.builder().bucket(name).build();

     */
    @PreDestroy
    public void destroy() {
        if (httpClient != null) {
            try {
                httpClient.close();
            } catch (final IOException e) {
                logger.error("Failed to close httpClient.", e);
            }
        }
    }

    /**
     * Extracts text from the input stream using the API endpoint.
     *
     * @param in the input stream to extract text from

        // Handle successful response
        response.getItems().forEach(item -> 
            System.out.println("Async suggestion: " + item.getText()[0])
        );
    })
    .error(throwable -> {
        // Handle error
        System.err.println("Error: " + throwable.getMessage());
    });
```

## Advanced Usage

### Index from Existing Documents

```java

     * @param item the SuggestItem containing the data to be indexed
     * @return a string representing the bulk line for OpenSearch indexing
     * @throws SuggesterException if an I/O error occurs during the creation of the bulk line
     */
    public static String createBulkLine(final String index, final String type, final SuggestItem item) {

     *
     * @param outputFile the converted output file
     * @param outExt the output file extension
     * @return the extracted text content
     * @throws ExtractException if an error occurs while reading the file
     */
    protected String getOutputContent(final File outputFile, final String outExt) {
        final Extractor extractor = getExtractor(outExt);
        if (extractor != null) {

    }

    /**
     * Returns an input stream from a deferred file output stream.
     *
     * @param dfos A deferred file output stream.
     * @return An input stream.
     * @throws IOException if an I/O error occurs.
     */
    protected InputStream getContentStream(final DeferredFileOutputStream dfos) throws IOException {
        if (dfos.isInMemory()) {
            return new ByteArrayInputStream(dfos.getData());
        }