copyWith method
Implementation
RemoveColumn copyWith({ String? taxable,
String? gst,
String? schemeDiscount,
String? expiredDiscount,
}) => RemoveColumn( taxable: taxable ?? _taxable,
gst: gst ?? _gst,
schemeDiscount: schemeDiscount ?? _schemeDiscount,
expiredDiscount: expiredDiscount ?? _expiredDiscount,
);