Function layout 

pub fn layout(
    view: &Reader<'_>,
    args: &DrawingArgs,
    date: &str,
    parts: &[PartsListLine],
) -> GeopResult<Layout>

The part’s drawing as args describe it, without its annotations (see compose): its views projected (see project) and laid out (see arrange), dated date, with parts its bill of materials if args asks for one.