docs: public EventServiceSegment getSegment(String service, boolean forceCreate) {
          EventServiceSegment segment = segments.get(service);
          if (segment == null && forceCreate) {
              // we can't make use of the ConcurrentUtil; we need to register the segment to the metricsRegistry in case of creation
              EventServiceSegment newSegment = new EventServiceSegment(service, nodeEngine.getService(service));
              EventServiceSegment existingSegment = segments.putIfAbsent(service, newSegment);
              if (existingSegment == null) {
                  segment = newSegment;
                  nodeEngine.getMetricsRegistry().scanAndRegister(newSegment, "event.[" + service + "]");
              } else {
                  segment = existingSegment;
              }
          }
          return segment;
      }