src/vs/workbench/contrib/webview/browser/overlayWebview.ts/OverlayWebview/constructor
class OverlayWebview:	public constructor(
		initInfo: WebviewInitInfo,
		@ILayoutService private readonly _layoutService: ILayoutService,
		@IWebviewService private readonly _webviewService: IWebviewService,
		@IContextKeyService private readonly _baseContextKeyService: IContextKeyService
	) {
		super();

		this.providedViewType = initInfo.providedViewType;
		this.origin = initInfo.origin ?? generateUuid();

		this._extension = initInfo.extension;
		this._options = initInfo.options;
		this._contentOptions = initInfo.contentOptions;
	}