code: func (c *Client) GetReceivedByAccountAsync(account string) FutureGetReceivedByAccountResult {
  	cmd := btcjson.NewGetReceivedByAccountCmd(account, nil)
  	return c.sendCmd(cmd)
  }
docs: // GetReceivedByAccountAsync returns an instance of a type that can be used to
  // get the result of the RPC at some future time by invoking the Receive
  // function on the returned instance.
  //
  // See GetReceivedByAccount for the blocking version and more details.