Accessing Trigger ID within a JS Rule

Setup, Configuration and Use Scripts & Rules
1

When creating a Cron or Channel Trigger, using Javascript, it is assigned an ID as shown in this extract from the example in the helper libary:

sRule.setTriggers([
    TriggerBuilder.create()
        .withId("aTimerTrigger")
        .withTypeUID("timer.GenericCronTrigger")
        .withConfiguration(
            new Configuration({
                "cronExpression": "0/10 * * * * ?"
            })).build()
    ]);

my question is how does one access this ID from within the triggered rule?