src/vs/platform/contextview/browser/contextViewService.ts/ContextViewService/constructor
class ContextViewService:	constructor(
		@ILayoutService readonly layoutService: ILayoutService
	) {
		super();

		this.container = layoutService.hasContainer ? layoutService.container : null;
		this.contextView = this._register(new ContextView(this.container, ContextViewDOMPosition.ABSOLUTE));
		this.layout();

		this._register(layoutService.onDidLayout(() => this.layout()));
	}