optionalPolymorphic<T extends JsonPolymorphic<T> > static method
A JsonKey that parses an optional JsonPolymorphic object.
Implementation
static JsonOptionalPolymorphicKey<T>
optionalPolymorphic<T extends JsonPolymorphic<T>>(
String key, List<T Function()> parsers) =>
JsonOptionalPolymorphicKey.parser(key, parsers);