docs: protected void unsetNonDeferrableScheduledExecutor(ServiceReference<ScheduledExecutorService> ref) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
              Tr.debug(tc, "unsetNonDeferrableScheduledExecutor", ref);
          nonDeferrableSchedXSvcRef.unsetReference(ref);
      }