code: @Reference(cardinality = ReferenceCardinality.MULTIPLE)
      protected void setJaasLoginModuleConfig(JAASLoginModuleConfig lmc, Map<String, Object> props) {
          String pid = (String) props.get(KEY_SERVICE_PID);
          loginModuleMap.put(pid, lmc);
      }
docs: SINCE THIS IS A STATIC REFERENCE DS provides enough synchronization so that we don't need to synchronize on the map.