This method takes a single integer as parameter that indicates by how many steps to go forward or go backward in the history stack, similar to window.history.go(n).
Examples
// go forward by one record, the same as router.forward()
router.go(1)
// go back by one record, the same as router.back()
router.go(-1)
// go forward by 3 records
router.go(3)
// fails silently if there aren't that many records
router.go(-100)
router.go(100)