Post an event of eventKind with payload of eventData to the Extension event stream.
void postEvent(String eventKind, Map eventData) {
  ArgumentError.checkNotNull(eventKind, 'eventKind');
  ArgumentError.checkNotNull(eventData, 'eventData');
  String eventDataAsString = json.encode(eventData);
  _postEvent(eventKind, eventDataAsString);
}
    © 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
    https://api.dart.dev/stable/2.5.0/dart-developer/postEvent.html