toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (costs != null) 'costs': costs!,
if (currencyCode != null) 'currencyCode': currencyCode!,
if (id != null) 'id': id!,
if (revenue != null) 'revenue': revenue!,
if (taxes != null) 'taxes': taxes!,
};