public static void setEventId(Object crumb) {
    if (ENABLED) {
      if (crumb instanceof EventID) {
        EventID other = EventIDs.get();
        if (other != null && other != crumb) {
          ((EventID) crumb).incBreadcrumbCounter();
          setBreadcrumb(Thread.currentThread(), CrumbType.EVENTID, crumb);
        }
      } else {
        setBreadcrumb(Thread.currentThread(), CrumbType.EVENTID, crumb);
      }
    }
  }
sets the given breadcrumb into the name of the current thread
geode-core/src/main/java/org/apache/geode/internal/util/Breadcrumbs.java