def normalise(self, to_currency):
out = Money(currency=to_currency)<EOL>for money in self._money_obs:<EOL><INDENT>out += converter.convert(money, to_currency)<EOL><DEDENT>return Balance([out])<EOL>
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