diff --git a/testing/scenario_app/lib/src/platform_echo_mixin.dart b/testing/scenario_app/lib/src/platform_echo_mixin.dart index 7d9e5d771dbdc..2567fa1cd2744 100644 --- a/testing/scenario_app/lib/src/platform_echo_mixin.dart +++ b/testing/scenario_app/lib/src/platform_echo_mixin.dart @@ -9,6 +9,7 @@ import 'scenario.dart'; /// Echo platform messages back to the sender. mixin PlatformEchoMixin on Scenario { + /// Handle a platform message. @override void onPlatformMessage( String name,