gridLogIf(ctx, err)
	if m.MuxID == 0 {
		atomic.StoreInt64(&c.LastPong, time.Now().Unix())
		return
	}
	if v, ok := c.outgoing.Load(m.MuxID); ok {
		v.pong(pong)
	} else {
		// We don't care if the client was removed in the meantime,
		// but we send a disconnect message to the server just in case.
		gridLogIf(ctx, c.queueMsg(message{Op: OpDisconnectClientMux, MuxID: m.MuxID}, nil))
	}
}