Map<String, Object> doc = new HashMap<>();
        assertEquals("aaa", languageHelper.createScript(doc, "aaa").getIdOrCode());

        doc.put("lang", "ja");
        assertEquals("aaa;ctx._source.title_ja=ctx._source.title;ctx._source.content_ja=ctx._source.content",
                languageHelper.createScript(doc, "aaa").getIdOrCode());
    }

    @Test
    public void test_getReindexScriptSource() {
        assertEquals(