structuredAttrs is enabled trying https://static.crates.io/crates/js_option/0.2.0/download % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 0 0 0 0 0 0 0 0 0 100 4527 100 4527 0 0 17171 0 0 100 4527 100 4527 0 0 17167 0 0 100 4527 100 4527 0 0 17165 0 0