Load the commodities for Amounts in this object.

def load_commodities(self):
        """
        Load the commodities for Amounts in this object.
        """
        if isinstance(self.available, Amount):
            self.available = Amount("{0:.8f} {1}".format(self.available.to_double(), self.currency))
        else:
            self.available = Amount("{0:.8f} {1}".format(self.available, self.currency))
        if isinstance(self.total, Amount):
            self.total = Amount("{0:.8f} {1}".format(self.total.to_double(), self.currency))
        else:
            self.total = Amount("{0:.8f} {1}".format(self.total, self.currency))