code: func (api *PrivateAdminAPI) AddPeer(url string) (bool, error) {
  	// Make sure the server is running, fail otherwise
  	server := api.node.Server()
  	if server == nil {
  		return false, ErrNodeStopped
  	}
  	// Try to add the url as a static peer and return
  	node, err := enode.ParseV4(url)
  	if err != nil {
  		return false, fmt.Errorf("invalid enode: %v", err)
  	}
  	server.AddPeer(node)
  	return true, nil
  }
docs: // AddPeer requests connecting to a remote node, and also maintaining the new
  // connection at all times, even reconnecting if it is lost.