Function kml::recurse

pub(crate) fn recurse(
    node: Node<'_, '_>, 
    shapes: &mut Vec<ExtraShape>, 
    skipped_count: &mut usize, 
    kv: &mut BTreeMap<String, String>, 
    gps_bounds: &GPSBounds, 
    require_all_pts_in_bounds: bool
) -> Result<()>