def __new__(cls, value=0, context=None, summary_instance=None):
        obj = Decimal.__new__(cls, value, context)
        obj.initialise_context(summary_instance)
        return obj
Create a new immutable Decimal object, adding our custom
dataset/ETHPy150Open willhardy/Roll-Your-Own/rollyourown/commerce/utils/formatting.py/FormattedDecimal.__new__