You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: general.rs
    path of file: ./repos/cacao/examples/todos_list/preferences
    
    the code of the file until where you have to start completion: //! The main guts of the Preferences window. We store all our preferences in
//!
    
    fn did_load(&mut self, view: View) {
        self.example_option.configure(
            "An example preference",
            "This can be true, or it can be false.",
            Defaults::should_whatever(), // initial value
            Defaults::toggle_should_whatever
        );

        view.add_subview(&self.example_option.view);

        LayoutConstraint::activate(&[
            self.example_option.view.top.constraint_equal_to(&view.top).offset(22.),
            self.example_option
                .view
                .leading
                .constraint_equal_to(&view.leading)
                .offset(22.),
            self.example_option
                .view
                .trailing
                .constraint_equal_to(&view.trailing)
                .offset(-22.),
            self.example_option.view.bottom.constraint_equal_to(&view.bottom).offset(-22.)
        ]);
    }