// Create large response data
        byte[] largeBody = new byte[10 * 1024 * 1024]; // 10MB
        for (int i = 0; i < largeBody.length; i++) {
            largeBody[i] = (byte) (i % 256);
        }

        ResponseData responseData = new ResponseData();
        responseData.setUrl("http://example.com/large");
        responseData.setResponseBody(largeBody);

        if (id.length() <= idPrefixLength) {
            return id;
        }
        return id.substring(0, idPrefixLength) + MessageDigestUtil.digest("SHA-256", id.substring(idPrefixLength));
    }

    /**
     * Extracts the URL from the target object using reflection.
     *
     * @param target The target object.
     * @return The URL string, or null if not found.