encodeKeyed method
Starts encoding a keyed collection or key-value pairs for the given key or id.
The returned KeyedEncoder should be used to encode the key-value pairs. The KeyedEncoder.end method should be called when all key-value pairs have been encoded.
Implementation
@override
KeyedEncoder encodeKeyed(String key, {int? id}) {
return StandardKeyedEncoder._(_value[key] = <String, dynamic>{}, _isHumanReadable, _customTypes);
}