toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (billingInvoiceCode != null)
'billingInvoiceCode': billingInvoiceCode!,
if (campaignId != null) 'campaignId': campaignId!,
if (preTaxAmountMicros != null)
'preTaxAmountMicros': preTaxAmountMicros!,
if (taxAmountMicros != null) 'taxAmountMicros': taxAmountMicros!,
if (totalAmountMicros != null) 'totalAmountMicros': totalAmountMicros!,
};