serializer property
Serializes response data into a String.
The default is conversion into JSON via json.encode.
If you are 100% sure that your response handlers will only
be JSON-encodable objects (i.e. primitives, Lists and Maps),
then consider setting serializer to JSON.encode.
To set it globally for the whole app, use the following helper:
app.injectSerializer(JSON.encode);
Implementation
FutureOr<String> Function(dynamic) serializer = c.json.encode;