code: func (q *graceTerminateRSList) remove(rs *listItem) bool {
  	q.lock.Lock()
  	defer q.lock.Unlock()
  
  	uniqueRS := rs.String()
  	if _, ok := q.list[uniqueRS]; ok {
  		delete(q.list, uniqueRS)
  		return true
  	}
  	return false
  }
docs: // remove remove an element from the rsList