postEvent method
All events dispatched by a WidgetInspectorService use this method instead of calling developer.postEvent directly.
This allows tests for WidgetInspectorService to track which events were dispatched by overriding this method.
Implementation
@protected
void postEvent(String eventKind, Map<Object, Object?> eventData, {String stream = 'Extension'}) {
developer.postEvent(eventKind, eventData, stream: stream);
}