docs: public void resetCallbackThreadState()
     {
        if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) SibTr.entry(this, tc, "resetCallbackThreadState");
        callbackThreadState = CallbackThreadState.STARTED_REGISTERED;
        callbackThreadCallback = null;
        if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) SibTr.exit(this, tc, "resetCallbackThreadState");
     }