src/vs/workbench/services/activity/browser/activityService.ts/ViewContainerActivityByView/constructor
class ViewContainerActivityByView:	constructor(
		private readonly viewId: string,
		@IViewDescriptorService private readonly viewDescriptorService: IViewDescriptorService,
		@IActivityService private readonly activityService: IActivityService,
	) {
		super();
		this._register(Event.filter(this.viewDescriptorService.onDidChangeContainer, e => e.views.some(view => view.id === viewId))(() => this.update()));
		this._register(Event.filter(this.viewDescriptorService.onDidChangeLocation, e => e.views.some(view => view.id === viewId))(() => this.update()));
	}