main function
void
main()
Implementation
void main() async {
List<MultiLineStringField> multiLineStringFields = [];
final jsonData = await File('./multilinestring.json').readAsString().then((fileContents) => json.decode(fileContents));
for (var elem in jsonData) {
multiLineStringFields.add(MultiLineStringField.fromJson(Map<String, dynamic>.from(elem)));
}
print(multiLineStringFields);
}