code: func (c *Client) GetAccountAsync(address btcutil.Address) FutureGetAccountResult {
  	addr := address.EncodeAddress()
  	cmd := btcjson.NewGetAccountCmd(addr)
  	return c.sendCmd(cmd)
  }
docs: // GetAccountAsync 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 GetAccount for the blocking version and more details.