message: [core/api/AppBuilder] remove typescript exclamation mark
diff: @@ -105,7 +105,7 @@ export default class AppBuilder {
  const FeatureFlags = this.apis && this.apis.get(featureFlagsApiRef);
  if (FeatureFlags) {
  - FeatureFlags!.registeredFeatureFlags = registeredFeatureFlags;
  + FeatureFlags.registeredFeatureFlags = registeredFeatureFlags;
  }
  routes.push(
  