how to create a child webview

[MrAliSalehi]

im trying to spawn a child webview to render a custom url, but i couldnt find any document or examples for this,my best guess was:

wry::WebViewBuilder::new_as_child(&window().window_handle().unwrap()).build().unwrap()
            .load_url("https://google.com").unwrap();

but it causes a panic and crashes the main window