// Test convert with multiple languages
        String text = "test text";
        String field = "content";

        List<String> results = converter.convert(text, field, "en", "ja");

        assertNotNull(results);
        // With multiple languages, should use ReadingConverterChain
    }

    @Test
    public void testConvertWithEmptyText() throws IOException {

        map.put("ギュ", new String[] { "gyu" });
        map.put("ギョ", new String[] { "gyo" });
        map.put("ギェ", new String[] { "gye" });

        map.put("ジャ", new String[] { "zya", "ja", "jya" });
        map.put("ジュ", new String[] { "zyu", "ju", "jyu" });
        map.put("ジョ", new String[] { "zyo", "jo", "jyo" });
        map.put("ジェ", new String[] { "zye", "je", "jye" });

        // Test convert with multiple languages
        converter.init();
        String text = "test";
        String field = "content";

        List<String> readings = converter.convert(text, field, "en", "ja", "fr");

        assertNotNull(readings);
        assertEquals(3, readings.size());
        assertEquals("TEST_en", readings.get(0));
        assertEquals("TEST_ja", readings.get(1));

        assertNotNull(tokensEn);
        assertEquals(2, tokensEn.size());

        // Test with Japanese
        List<AnalyzeToken> tokensJa = analyzer.analyze(text, field, "ja");
        assertNotNull(tokensJa);
        assertEquals(2, tokensJa.size());

        // Test with null language
        List<AnalyzeToken> tokensNull = analyzer.analyze(text, field, null);

        String[] fields = { "field1", "field2" };
        String[] tags = { "tag1", "tag2" };
        String[] roles = { "role1", "role2" };
        String[] languages = { "en", "ja" };
        SuggestItem.Kind kind = SuggestItem.Kind.QUERY;

        SuggestItem item = new SuggestItem(text, readings, fields, 100L, 50L, 1.5f, tags, roles, languages, kind);

        assertNotNull(item);

    .setSize(10)                           // max results
    .setTags(new String[]{"category"})      // filter by tags
    .setRoles(new String[]{"user"})         // filter by roles  
    .setLanguages(new String[]{"en", "ja"}) // language preference
    .setFields(new String[]{"title"})       // search specific fields
    .execute()
    .getResponse();
```

## Project Structure

```
src/

    /** Supported languages. */
    protected static final String[] SUPPORTED_LANGUAGES = { "ar", "bg", "bn", "ca", "cs", "da", "de", "el", "en", "es", "et", "fa", "fi",
            "fr", "gu", "he", "hi", "hr", "hu", "id", "it", "ja", "ko", "lt", "lv", "mk", "ml", "nl", "no", "pa", "pl", "pt", "ro", "ru",
            "si", "sq", "sv", "ta", "te", "th", "tl", "tr", "uk", "ur", "vi", "zh-cn", "zh-tw" };

    /**
     * Constructor for AnalyzerSettings.