def BalanceFor(self, assetId):
        """
        Get the balance for a given asset id.

        Args:
            assetId (UInt256):

        Returns:
            Fixed8: balance value.
        """
        for key, fixed8 in self.Balances.items():
            if key == assetId:
                return fixed8
        return Fixed8(0)
Get the balance for a given asset id.

        Args:
            assetId (UInt256):

        Returns:
            Fixed8: balance value.