etcdserver/raft.go
func (r *raftNode) pauseSending() {
	p := r.transport.(rafthttp.Pausable)
	p.Pause()
}
func (r *raftNode) pauseSending() {
	p := r.transport.(rafthttp.Pausable)
	p.Pause()
}
func ( r * raftNode ) pauseSending ( ) { p := r . transport . ( rafthttp . Pausable ) p . Pause ( ) }
// for testing
for testing