public void test_getCrawlerDocumentFullstopCharsAsArray() {
        FessProp.propMap.clear();
        FessConfig fessConfig = new FessConfig.SimpleImpl() {
            @Override
            public String getCrawlerDocumentFullstopChars() {
                return "u0020u3000";
            }
        };

        int[] chars = fessConfig.getCrawlerDocumentFullstopCharsAsArray();
        assertEquals(2, chars.length);

                }
            }
            propMap.put(key, spaceChars);
        }
        return spaceChars;
    }

    String getCrawlerDocumentFullstopChars();

    default boolean endsWithFullstop(final String s) {
        if (StringUtil.isBlank(s)) {
            return false;
        }