go func() {
		wg.Wait()
		defer xioutil.SafeClose(send)
		err := m.handleRequests(ctx, msg, send, handler, handlerIn)
		if err != nil {
			handlerErr.Store(err)
		}
	}()

	// Response sender goroutine...
	go func(outBlock <-chan struct{}) {
		wg.Wait()
		defer m.parent.deleteMux(true, m.ID)
		m.sendResponses(ctx, send, c, &handlerErr, outBlock)
	}(m.outBlock)

	// Remote aliveness check if needed.

	}
	return 0
}

func (t *Type) Common() *Type {
	return t
}

type ChanDir int

const (
	RecvDir    ChanDir = 1 << iota         // <-chan
	SendDir                                // chan<-
	BothDir            = RecvDir | SendDir // chan
	InvalidDir ChanDir = 0
)

// ChanType represents a channel type
type ChanType struct {
	Type
	Elem *Type
	Dir  ChanDir
}

			return
		}
	}

	// Check if we are creating svc account for request sender.
	isSvcAccForRequestor := false
	if targetUser == requestorUser || targetUser == requestorParentUser {
		isSvcAccForRequestor = true
	}

	// If we are creating svc account for request sender, ensure
	// that targetUser is a real user (i.e. not derived
	// credentials).
	if isSvcAccForRequestor {

	}
	if !m.respMu.TryLock() {
		// Cancel before locking - will unblock any pending sends.
		if m.cancelFn != nil {
			m.cancelFn(context.Canceled)
		}
		// Wait for senders to release.
		m.respMu.Lock()
	}

	defer m.respMu.Unlock()
	m.closeLocked()
}

func (m *muxClient) closeLocked() {
	if m.closed {
		return
	}

				close(sig)
				return

			default:
				syscall.Kill(syscall.Getpid(), syscall.SIGUSR1)
				runtime.Gosched()
			}
		}
	}()

	for range sig {
		// Receive signals until the sender closes sig.
	}
}

func testCancel(t *testing.T, ignore bool) {
	// Ask to be notified on c1 when a SIGWINCH is received.
	c1 := make(chan os.Signal, 1)
	Notify(c1, syscall.SIGWINCH)
	defer Stop(c1)

			ch.mustBeExported()
			tt := (*chanType)(unsafe.Pointer(ch.typ()))
			if ChanDir(tt.Dir)&SendDir == 0 {
				panic("reflect.Select: SendDir case using recv-only channel")
			}
			rc.ch = ch.pointer()
			rc.typ = toRType(&tt.Type)
			v := c.Send
			if !v.IsValid() {
				panic("reflect.Select: SendDir case missing Send value")
			}
			v.mustBeExported()
			v = v.assignTo("reflect.Select", tt.Elem, nil)

//   - oobn is the number of control data bytes read into oob; this may be interpreted using [ParseSocketControlMessage]
//   - recvflags is flags returned by recvmsg
//   - from is the address of the sender
//
// If the underlying socket type is not SOCK_DGRAM, a received message
// containing oob data and a single '\0' of non-control data is treated as if

      }
      flowControlListener.receivingConnectionWindowChanged(readBytes)
    }
  }

  /**
   * Returns a new server-initiated stream.
   *
   * @param associatedStreamId the stream that triggered the sender to create this stream.
   * @param out true to create an output stream that we can use to send data to the remote peer.
   *     Corresponds to `FLAG_FIN`.
   */
  @Throws(IOException::class)
  fun pushStream(

type aTextOff = abi.TextOff

// ChanDir represents a channel type's direction.
type ChanDir int

const (
	RecvDir ChanDir             = 1 << iota // <-chan
	SendDir                                 // chan<-
	BothDir = RecvDir | SendDir             // chan
)

// arrayType represents a fixed array type.
type arrayType = abi.ArrayType

// chanType represents a channel type.
type chanType = abi.ChanType

		// Returning error here is too noisy.
		return nil
	case c.outQueue <- msg:
		return nil
	}
}

// queueMsg queues a message, with an optional payload.
// sender should not reference msg.Payload
func (c *Connection) queueMsg(msg message, payload sender) error {
	// Add baseflags.
	msg.Flags.Set(c.baseFlags)
	// This cannot encode subroute.
	msg.Flags.Clear(FlagSubroute)
	if payload != nil {