{"func", ValueOf(func(f func(int, int) bool) {
			for i := range 4 {
				f(i, i+1)
			}
		}), func(t *testing.T, s iter.Seq2[Value, Value]) {
			i := int64(0)
			for v1, v2 := range s {
				if v1.Int() != i {
					t.Fatalf("got %d, want %d", v1.Int(), i)
				}
				i++
				if v2.Int() != i {
					t.Fatalf("got %d, want %d", v2.Int(), i)
				}
			}
			if i != 4 {
				t.Fatalf("should loop four times")
			}

		return append(dst, small(int(i))...)
	}
	dst, _ = formatBits(dst, i, base, false, true)
	return dst
}

// small returns the string for an i with 0 <= i < nSmalls.
func small(i int) string {
	if i < 10 {
		return digits[i : i+1]
	}
	return smallsString[i*2 : i*2+2]
}

const nSmalls = 100

const smallsString = "00010203040506070809" +
	"10111213141516171819" +
	"20212223242526272829" +

)

var (
	_CurveID_index_0 = [...]uint8{0, 9, 18, 27}
)

func (i CurveID) String() string {
	switch {
	case 23 <= i && i <= 25:
		i -= 23
		return _CurveID_name_0[_CurveID_index_0[i]:_CurveID_index_0[i+1]]
	case i == 29:
		return _CurveID_name_1
	case i == 25497:
		return _CurveID_name_2
	default:
		return "CurveID(" + strconv.FormatInt(int64(i), 10) + ")"
	}
}
func _() {

	done := make(chan bool)
	for i := 0; i < 32; i++ {
		m := ^uint32(1 << i)
		go func() {
			for i := range a {
				atomic.And(&a[i], m)
			}
			done <- true
		}()
	}
	for i := 0; i < 32; i++ {
		<-done
	}

	// Check that the array has been totally cleared.
	for i, v := range a {
		if v != 0 {
			t.Fatalf("a[%v] not cleared: want %#x, got %#x", i, uint32(0), v)
		}
	}
}

			return func(i, j int) { ps[i], ps[j] = ps[j], ps[i] }
		}
		if typ.Kind() == abi.String {
			ss := *(*[]string)(v.ptr)
			return func(i, j int) { ss[i], ss[j] = ss[j], ss[i] }
		}
	} else {
		switch size {
		case 8:
			is := *(*[]int64)(v.ptr)
			return func(i, j int) { is[i], is[j] = is[j], is[i] }
		case 4:
			is := *(*[]int32)(v.ptr)
			return func(i, j int) { is[i], is[j] = is[j], is[i] }

}

func heapSiftUp(heap []*batchCursor, i int) int {
	for i > 0 && heap[(i-1)/2].ev.time > heap[i].ev.time {
		heap[(i-1)/2], heap[i] = heap[i], heap[(i-1)/2]
		i = (i - 1) / 2
	}
	return i
}

func heapSiftDown(heap []*batchCursor, i int) int {
	for {
		m := min3(heap, i, 2*i+1, 2*i+2)
		if m == i {
			// Heap invariant already applies.
			break
		}
		heap[i], heap[m] = heap[m], heap[i]
		i = m
	}

}

func (i Instances) NamespacedName() NamespacedName {
	return i.Config().NamespacedName()
}

func (i Instances) PortForName(name string) Port {
	return i.Config().Ports.MustForName(name)
}

func (i Instances) Config() Config {
	return i.mustGetFirst().Config()
}

func (i Instances) Instances() Instances {
	return i
}

func (i Instances) mustGetFirst() Instance {

			return i
		}
		i++
		fails++
		if fails >= 4+i>>4 && i < t {
			// See comment in ../bytes/bytes.go.
			j := bytealg.IndexRabinKarp(s[i:], substr)
			if j < 0 {
				return -1
			}
			return i + j
		}
	}
	return -1
}

func Cut(s, sep string) (before, after string, found bool) {
	if i := Index(s, sep); i >= 0 {
		return s[:i], s[i+len(sep):], true
	}
	return s, "", false
}

		sum := 0
		for i := 0; i < 1000; i++ {
			sum += i
		}
		fmt.Println("Computed once:", sum)
		return sum
	})
	done := make(chan bool)
	for i := 0; i < 10; i++ {
		go func() {
			const want = 499500
			got := once()
			if got != want {
				fmt.Println("want", want, "got", got)
			}
			done <- true
		}()
	}
	for i := 0; i < 10; i++ {
		<-done
	}
	// Output:

	wt := make([]weak.Pointer[T], 10)
	for i := range bt {
		bt[i] = new(T)
		wt[i] = weak.Make(bt[i])
	}
	for i := range bt {
		st := wt[i].Strong()
		if st != bt[i] {
			t.Fatalf("weak pointer is not the same as strong pointer: %p vs. %p", st, bt[i])
		}
		if wp := weak.Make(st); wp != wt[i] {
			t.Fatalf("new weak pointer not equal to existing weak pointer: %v vs. %v", wp, wt[i])
		}
		if i == 0 {
			continue
		}