src/vs/workbench/api/common/extHostWebviewPanels.ts/ExtHostWebviewPanel/constructor
class ExtHostWebviewPanel:	constructor(
		handle: extHostProtocol.WebviewHandle,
		proxy: extHostProtocol.MainThreadWebviewPanelsShape,
		viewType: string,
		title: string,
		viewColumn: vscode.ViewColumn | undefined,
		panelOptions: vscode.WebviewPanelOptions,
		webview: ExtHostWebview
	) {
		super();
		this.#handle = handle;
		this.#proxy = proxy;
		this.#viewType = viewType;
		this.#options = panelOptions;
		this.#viewColumn = viewColumn;
		this.#title = title;
		this.#webview = webview;
	}