code: func (c *Client) GetBalance(account string) (btcutil.Amount, error) {
  	return c.GetBalanceAsync(account).Receive()
  }
docs: // GetBalance returns the available balance from the server for the specified
  // account using the default number of minimum confirmations.  The account may
  // be "*" for all accounts.
  //
  // See GetBalanceMinConf to override the minimum number of confirmations.