code: @Reference(name = REFERENCE_ENDPOINT_ACTIVATION_SERVICES,
                 service = EndpointActivationService.class,
                 policy = ReferencePolicy.DYNAMIC,
                 cardinality = ReferenceCardinality.MULTIPLE)
      protected synchronized void addEndPointActivationService(ServiceReference<EndpointActivationService> reference) {
          String activationSvcId = (String) reference.getProperty(ACT_SPEC_CFG_ID);
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
              Tr.debug(tc, "activationSvcId : " + activationSvcId);
          }
  
          EndpointActivationServiceInfo easInfo = createEndpointActivationServiceInfo(activationSvcId);
  
          // Deactivate any endpoints that were using the old service.
          if (easInfo.service != null) {
              deactivateEndpoints(easInfo.endpointFactories);
          }
  
          // Activate any endpoints with the new service.
          easInfo.setReference(reference);
          activateDeferredEndpoints(easInfo.endpointFactories);
      }
docs: dynamic/optional/multiple. May be called at any time and in any order
  
  @param reference reference to EndpointActivationService service