Empty lines (containing "") are hidden in List output

[fritzrehde]

I am building an alternative to the watch command watchbind.
I am wondering why the example code

	let items = vec![
		ListItem::new("line one"),
		ListItem::new(""),
		ListItem::new("line four"),
	];
	let list = List::new(items)
		.style(Style::default().fg(Color::White))
		.highlight_style(Style::default().fg(Color::Black).bg(Color::White));
	f.render_stateful_widget(list, f.size(), &mut events.state);

does not render the second line, but the state obviously knows about it because I can scroll normally with j and k (which I programmed).