public NaturalLanguageStringV2Bean getString(NaturalLanguageStringBean nls) {
if (nls == null)
return null;
if (nls.getValue() == null || nls.getValue().isEmpty())
return null;
NaturalLanguageStringV2Bean bean = new NaturalLanguageStringV2Bean();
bean.setLang(nls.getLang());
bean.setValue(nls.getValue());
return bean;
}