}

func recycleFunc[RT RoundTripper](newRT func() RT) (newFn func() RT, recycle func(r RT)) {
	rAny := any(newRT())
	var rZero RT
	if _, ok := rAny.(Recycler); ok {
		return newRT, func(r RT) {
			if r != rZero {
				if rc, ok := any(r).(Recycler); ok {
					rc.Recycle()
				}
			}
		}
	}
	pool := bpool.Pool[RT]{
		New: func() RT {
			return newRT()
		},
	}
	return pool.Get,

	accessKey := vars["accessKey"]

	ok, _, err := globalIAMSys.IsTempUser(accessKey)
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}
	if ok {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, errIAMActionNotAllowed), r.URL)
		return
	}

	// This API only supports removal of internal users not service accounts.
	ok, _, err = globalIAMSys.IsServiceAccount(accessKey)

		case <-doneCh:
			if err := context.Cause(s.ctx); !errors.Is(err, errStreamEOF) {
				return err
			}
			// Fall through to be sure we have returned all responses.
			doneCh = nil
		case resp, ok := <-s.responses:
			if !ok {
				done = true
				return nil
			}
			if resp.Err != nil {
				s.cancel(resp.Err)
				return resp.Err
			}
			err = next(resp.Msg)
			if err != nil {
				s.cancel(err)
				return err

			case <-ctxDone:
				return ctx.Err()
			case v, ok := <-in[0]:
				if !ok {
					return nil
				}
				select {
				case <-ctxDone:
					return ctx.Err()
				case out <- v:
				}
			}
		}
	}

	selectFrom := func(idx int) error {
		select {
		case <-ctxDone:
			return ctx.Err()
		case entry, ok := <-in[idx]:
			if !ok {
				top[idx] = nil
				nDone++
			} else {

func IsPresent() (bool, error) {
	// isPresent reports whether at least one of the
	// given env. variables is present.
	isPresent := func(vars ...string) bool {
		for _, v := range vars {
			if _, ok := os.LookupEnv(v); ok {
				return ok
			}
		}
		return false
	}

	// First, check which KMS/KES env. variables are present.
	// Only one set, either KMS, KES or static key must be
	// present.

		}
	}

	oldTargets, others := splitTargets(targetsList.get(), types.TargetHTTP)
	newWebhooks = append(newWebhooks, others...)

	for i := range oldTargets {
		currentTgt, ok := oldTargets[i].(*http.Target)
		if !ok {
			continue
		}
		var newTgt *http.Target

		for ii := range tgts {
			if currentTgt.Name() == tgts[ii].Name() {
				newTgt = tgts[ii]
				currentTgt.AssignMigrateTarget(newTgt)

		bi := BucketInfo{
			Name:    volInfo.Name,
			Created: volInfo.Created,
		}
		if vi, ok := deletedBuckets.Load(volInfo.Name); ok {
			bi.Deleted = vi.Created
		}
		buckets = append(buckets, bi)
		return true
	})

	deletedBuckets.Range(func(_ string, v VolInfo) bool {
		if _, ok := healBuckets.Load(v.Name); !ok {
			buckets = append(buckets, BucketInfo{
				Name:    v.Name,
				Deleted: v.Created,
			})

    id: str
    title: str | None = None
    customer: str
    total: float


class InvoiceEvent(BaseModel):
    description: str
    paid: bool


class InvoiceEventReceived(BaseModel):
    ok: bool


invoices_callback_router = APIRouter()


@invoices_callback_router.post(
    "{$callback_url}/invoices/{$request.body.id}", response_model=InvoiceEventReceived
)

	// Close when we reach 0
	globalServiceFreezeCnt--
	if globalServiceFreezeCnt <= 0 {
		// Set to a nil channel.
		var _ch chan struct{}
		if val := globalServiceFreeze.Swap(_ch); val != nil {
			if ch, ok := val.(chan struct{}); ok && ch != nil {
				// Close previous non-nil channel.
				xioutil.SafeClose(ch)
			}
		}
		globalServiceFreezeCnt = 0 // Don't risk going negative.
	}
	globalServiceFreezeMu.Unlock()

          Response
            .Builder()
            .request(chain.request())
            .protocol(Protocol.HTTP_1_1)
            .code(200)
            .message("OK")
            .body("Hello".toResponseBody())
            .header("Content-Encoding", "piedpiper")
            .build()
        }.build()