Map<String, Object> doc = new HashMap<>();
        doc.put("special", "!@#$%^&*()_+-=[]{}|;':\",./<>?");
        doc.put("unicode", "こんにちは世界");
        doc.put("emoji", "😀🎉");

        SearchResult result = SearchResult.create().addDocument(doc).build();

        assertEquals(1, result.getDocumentList().size());

 * points</a> in the range {@code 0x10000} to {@code 0x10FFFF} which includes the majority of
 * assigned characters, including important CJK characters and emoji.
 *
 * <p>Supplementary characters are <a
 * href="https://docs.oracle.com/javase/8/docs/api/java/lang/Character.html#supplementary">encoded