return func(set map[Elt]sets.Empty) Accumulator {
		var ans Accumulator
		for elt := range set {
			ans = reduceFn(ans, mapFn(elt))
		}
		return ans
	}
}

// SliceMapReduce is map-reduce starting from a slice.
func SliceMapReduce[Elt, Result, Accumulator any](mapFn func(Elt) Result, reduceFn func(Accumulator, Result) Accumulator) func([]Elt) Accumulator {
	return func(slice []Elt) Accumulator {
		var ans Accumulator

	}
	goodSliceOfRequests := SliceMapReduce(goodRequest, or)
	if goodSliceOfRequests(qsd.QueuelessExecutingRequests) {
		t.Logf("Found user %s among queueless requests", username)
		return
	}
	goodQueueDump := func(qd debug.QueueDump) bool {
		return goodSliceOfRequests(qd.Requests) || goodSliceOfRequests(qd.RequestsExecuting)
	}
	if SliceMapReduce(goodQueueDump, or)(qsd.Queues) {