code: func (c *Client) GetAllProvisionWatchers() ([]contract.ProvisionWatcher, error) {
  	conn := c.Pool.Get()
  	defer conn.Close()
  
  	objects, err := getObjectsByRange(conn, db.ProvisionWatcher, 0, -1)
  	if err != nil {
  		return []contract.ProvisionWatcher{}, err
  	}
  
  	pw := make([]contract.ProvisionWatcher, len(objects))
  	for i, object := range objects {
  		err = unmarshalProvisionWatcher(object, &pw[i])
  		if err != nil {
  			return []contract.ProvisionWatcher{}, err
  		}
  	}
  
  	return pw, nil
  }
docs: //  ----------------------Provision Watcher -----------------------------*/