You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: node.go
    path of file: ./repos/learning/golang/practice/go-crontab/gopath/src/github.com/coreos/etcd/raft/rafttest
    
    the code of the file until where you have to start completion: // Copyright 2015 The etcd Authors
//
// Licensed under 
    
func (n *node) start() {
	n.stopc = make(chan struct{})
	ticker := time.Tick(5 * time.Millisecond)

	go func() {
		for {
			select {
			case <-ticker:
				n.Tick()
			case rd := <-n.Ready():
				if !raft.IsEmptyHardState(rd.HardState) {
					n.mu.Lock()
					n.state = rd.HardState
					n.mu.Unlock()
					n.storage.SetHardState(n.state)
				}
				n.storage.Append(rd.Entries)
				time.Sleep(time.Millisecond)
				// TODO: make send async, more like real world...
				for _, m := range rd.Messages {
					n.iface.send(m)
				}
				n.Advance()
			case m := <-n.iface.recv():
				go n.Step(context.TODO(), m)
			case <-n.stopc:
				n.Stop()
				log.Printf("raft.%d: stop", n.id)
				n.Node = nil
				close(n.stopc)
				return
			case p := <-n.pausec:
				recvms := make([]raftpb.Message, 0)
				for p {
					select {
					case m := <-n.iface.recv():
						recvms = append(recvms, m)
					case p = <-n.pausec:
					}
				}
				// step all pending messages
				for _, m := range recvms {
					n.Step(context.TODO(), m)
				}
			}
		}
	}()
}