writeln!(w, "pub extern \"C\" fn {}_some(o: {}) -> {} {{", mangled_container, inner_type, mangled_container).unwrap();
writeln!(w, "\t{}::Some(o)", mangled_container).unwrap();
writeln!(w, "}}").unwrap();
writeln!(w, "#[no_mangle]").unwrap();
writeln!(w, "pub extern \"C\" fn {}_some(o: {}) -> {} {{", mangled_container, inner_type, mangled_container).unwrap();
writeln!(w, "\t{}::Some(o)", mangled_container).unwrap();
writeln!(w, "}}").unwrap();
writeln!(w, "#[no_mangle]").unwrap();