code: @Reference(name = "rRSXAResourceFactory", service = RRSXAResourceFactory.class, policy = ReferencePolicy.DYNAMIC, cardinality = ReferenceCardinality.OPTIONAL)
      protected void setRRSXAResourceFactory(ServiceReference<RRSXAResourceFactory> ref) {
          rrsXAResFactorySvcRef.setReference(ref);
      }
docs: Declarative Services method for setting the RRS XA resource factory service implementation reference.
  
  @param ref reference to the service