toJson method
Implementation
@override
Map<String, Object?> toJson() => {
if (purpose != null) "purpose": encodeValue(purpose),
if (status != null) "status": encodeValue(status),
if (pageNumber != null) "page_number": encodeValue(pageNumber),
if (pageSize != null) "page_size": encodeValue(pageSize),
if (createdAfter != null) "created_after": encodeValue(createdAfter),
if (createdBefore != null) "created_before": encodeValue(createdBefore),
};