How to overcome code duplication?

Question

go

There are helpers for robots with a global map (it is possible to work with it only through them). Here I did, but the code is duplicated a little less than everywhere. How can this matter be corrected?

func Get(id string) (Sessid, bool) {
  rw := &sync.RWMutex{}
  rw.RLock()
  defer rw.RUnlock()
  val, ok := stSessid[id].Storage
  return val, ok
}

func Set(id string, value Sessid) error {
  _, dublicate := ramGet(id)
  if dublicate {
    return errors.New("Такой ключ уже есть")
  }
  r := &sync.Mutex{}
  r.Lock()
  defer r.Unlock()
  stSessid[id].Storage = value
}

func Del(id string) error {
  _, dublicate := ramGet(id)
  if !dublicate {
    return errors.New("Ключа нету")
  }
  r := &sync.Mutex{}
  r.Lock()
  defer r.Unlock()
  delete(stSessid, id)
}
func Up(id string, value Sessid) error {
  _, dublicate := ramGet(id)
  if !dublicate {
    return errors.New("Ключа нету")
  }
  r := &sync.Mutex{}
  r.Lock()
  defer r.Unlock()
  stSessid[id].Storage = value
}

Answer 1

A little copy-paste, it's normal for go.
You have another terrible problem here, you create mutexes as local variables. As a result, they are useless here.