Function preview_head

fn preview_head(
    ui: &mut Ui,
    thumbs: &mut Option<&mut ThumbCache>,
    live: Option<&PreviewFrame>,
    palette: &Palette,
    path: &str,
    meta: &str,
    extra: impl FnOnce(&mut Ui),
)

Name / path / format, over the picture — shared by both previews.