fmt.Println(client.MuxID, c.String(), "Connection.newMuxClient: RELOADED MUX. loaded:", loaded, "found:", found)
			}
			return client, nil
		}
		client.MuxID = atomic.AddUint64(&c.NextID, 1)
	}
}

// newMuxClient returns a mux client for manual use.
func (c *Subroute) newMuxClient(ctx context.Context) (*muxClient, error) {
	cl, err := c.Connection.newMuxClient(ctx)
	if err != nil {
		return nil, err
	}

	respErr            atomic.Pointer[error]
	clientPingInterval time.Duration
}

// Response is a response from the server.
type Response struct {
	Msg []byte
	Err error
}

func newMuxClient(ctx context.Context, muxID uint64, parent *Connection) *muxClient {
	ctx, cancelFn := context.WithCancelCause(ctx)
	return &muxClient{
		MuxID:              muxID,
		ctx:                ctx,
		cancelFn:           cancelFn,