import 'package:built_value/serializer.dart'; class DateTimeSerializer implements PrimitiveSerializer { @override DateTime deserialize( Serializers serializers, Object serialized, { FullType specifiedType = FullType.unspecified, }) { assert(serialized is String, "DateTimeSerializer expected 'String' but got ${serialized.runtimeType}"); return DateTime.parse(serialized as String); } @override Object serialize( Serializers serializers, DateTime dt, { FullType specifiedType = FullType.unspecified, }) => dt.toString(); @override Iterable get types => [DateTime]; @override String get wireName => 'DateTime'; }