You can mix-and-match, e.g. new(required_arg_1, required_arg_2, Options { foo: "bar", ..Default::default() }) or Options { foo: "bar", ..Default::default

You can mix-and-match, e.g. new(required_arg_1, required_arg_2, Options { foo: "bar", ..Default::default() }) or Options { foo: "bar", ..Default::default() }).build(required_arg_1, required_arg_2)