code: func (c *Client) NotifyNewTransactions(verbose bool) error {
  	return c.NotifyNewTransactionsAsync(verbose).Receive()
  }
docs: // NotifyNewTransactions registers the client to receive notifications every
  // time a new transaction is accepted to the memory pool.  The notifications are
  // delivered to the notification handlers associated with the client.  Calling
  // this function has no effect if there are no notification handlers and will
  // result in an error if the client is configured to run in HTTP POST mode.
  //
  // The notifications delivered as a result of this call will be via one of
  // OnTxAccepted (when verbose is false) or OnTxAcceptedVerbose (when verbose is
  // true).
  //
  // NOTE: This is a btcd extension and requires a websocket connection.