src/vs/workbench/contrib/notebook/browser/contrib/clipboard/notebookClipboard.ts/withWebview
function withWebview(accessor: ServicesAccessor, f: (webviewe: IWebview) => void) {
	const webview = getFocusedWebviewDelegate(accessor);
	if (webview) {
		f(webview);
		return true;
	}
	return false;
}