def normalise(self, to_currency):
        """Normalise this balance into a single currency

        Args:
            to_currency (str): Destination currency

        Returns:
            (Balance): A new balance object containing a single Money value in the specified currency
        """
        out = Money(currency=to_currency)
        for money in self._money_obs:
            out += converter.convert(money, to_currency)
        return Balance([out])
Normalise this balance into a single currency

        Args:
            to_currency (str): Destination currency

        Returns:
            (Balance): A new balance object containing a single Money value in the specified currency