*   It is similar to a Promise in JavaScript.
 *   It allows you to register callbacks that will be executed when the computation is complete,
 *   either successfully (resolve) or with an error (reject).
 * </p>
 *
 * <p>
 *   The Deferred class has a Promise inner class that allows you to register callbacks
 *   to be executed when the computation is complete.

        try {
            deferred.promise().getResponse(10, TimeUnit.SECONDS);
            fail();
        } catch (SuggesterException e) {
            assertEquals("An error occurred during the deferred computation.", e.getMessage());
        }
    }