code: @Reference(service = WsLocationAdmin.class,
                 policy = ReferencePolicy.DYNAMIC,
                 cardinality = ReferenceCardinality.MANDATORY)
      protected void setLocationService(WsLocationAdmin locationService) {
          this.locationService = locationService;
          if (restJMXAddressWorkareaFile == null) {
              restJMXAddressWorkareaFile = createJMXWorkAreaResource(locationService);
          }
          if (restJMXAddressStateFile == null) {
              restJMXAddressStateFile = createJMXStateResource(locationService);
          }
      }
docs: Set the dynamic reference to the WsLocationAdmin service.
  If the service is replaced, the new service will be set before
  the old is removed.
  
  @param locationService