docs: public MucConfigFormManager setIsPasswordProtected(boolean isPasswordProtected)
                      throws MucConfigurationNotSupportedException {
          if (!supportsMembersOnly()) {
              throw new MucConfigurationNotSupportedException(MUC_ROOMCONFIG_PASSWORDPROTECTEDROOM);
          }
          answerForm.setAnswer(MUC_ROOMCONFIG_PASSWORDPROTECTEDROOM, isPasswordProtected);
          return this;
      }