code: public String getDescriptiveText(String xmllang) {
          Objects.requireNonNull(xmllang, "xmllang must not be null");
          return descriptiveTexts.get(xmllang);
      }
docs: Get the descriptive test of this SASLFailure.
  <p>
  Returns the descriptive text of this SASLFailure in the given language. May return null if not available.
  </p>
  
  @param xmllang the language.
  @return the descriptive text or null.