onData abstract method

void onData(void handleData(T data))

Set or override the data event handler of this subscription.

This method overrides the handler that has been set at the invocation of Stream.listen.

Source

void onData(void handleData(T data));

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-async/StreamSubscription/onData.html