src/vs/workbench/api/common/extHostWebviewView.ts/ExtHostWebviewView/constructor
class ExtHostWebviewView:	constructor(
		handle: extHostProtocol.WebviewHandle,
		proxy: extHostProtocol.MainThreadWebviewViewsShape,
		viewType: string,
		title: string | undefined,
		webview: ExtHostWebview,
		isVisible: boolean,
	) {
		super();

		this.#viewType = viewType;
		this.#title = title;
		this.#handle = handle;
		this.#proxy = proxy;
		this.#webview = webview;
		this.#isVisible = isVisible;
	}