code: func (s *StanServer) createSubStore() *subStore {
  	subs := &subStore{
  		psubs:    make([]*subState, 0, 4),
  		qsubs:    make(map[string]*queueState),
  		durables: make(map[string]*subState),
  		acks:     make(map[string]*subState),
  		stan:     s,
  	}
  	return subs
  }
docs: // createSubStore creates a new instance of `subStore`.