docs: @Override
      public MessagingAuthenticationService getMessagingAuthenticationService() {
          SibTr.entry(tc, CLASS_NAME + "getMessagingAuthenticationService");
  
          if (sibAuthenticationService == null) {
              sibAuthenticationService = new MessagingAuthenticationServiceImpl(this);
          }
  
          SibTr.exit(tc, CLASS_NAME + "getMessagingAuthenticationService", sibAuthenticationService);
          return sibAuthenticationService;
      }