code: func handleStopNotifyReceived(wsc *wsClient, icmd interface{}) (interface{}, error) {
  	cmd, ok := icmd.(*btcjson.StopNotifyReceivedCmd)
  	if !ok {
  		return nil, btcjson.ErrRPCInternal
  	}
  
  	// Decode addresses to validate input, but the strings slice is used
  	// directly if these are all ok.
  	err := checkAddressValidity(cmd.Addresses, wsc.server.cfg.ChainParams)
  	if err != nil {
  		return nil, err
  	}
  
  	for _, addr := range cmd.Addresses {
  		wsc.server.ntfnMgr.UnregisterTxOutAddressRequest(wsc, addr)
  	}
  
  	return nil, nil
  }
docs: // handleStopNotifyReceived implements the stopnotifyreceived command extension
  // for websocket connections.