src/vs/workbench/services/activity/browser/activityService.ts/ActivityService/showViewContainerActivity
class ActivityService:	showViewContainerActivity(viewContainerId: string, { badge, clazz, priority }: IActivity): IDisposable {
		const viewContainer = this.viewDescriptorService.getViewContainerById(viewContainerId);
		if (viewContainer) {
			const location = this.viewDescriptorService.getViewContainerLocation(viewContainer);
			if (location !== null) {
				return this.paneCompositeService.showActivity(viewContainer.id, location, badge, clazz, priority);
			}
		}
		return Disposable.None;
	}