toJson method
Implementation
Map<String, dynamic> toJson() => {
'tax_percentage': taxPercentage,
'taxable_amount': taxableAmount,
'vat': vat,
'amount': amount,
'description': description,
if (installments != null) 'installments': installments!.value,
if (installmentsType != null)
'installments_type': installmentsType!.value,
'dev_reference': devReference,
};