Redirect to a different page from Library class in CI4

This works in a html view may work in a library not sure or tested.

PHP Code:

// Try to use a named route.                        |name
$routes->get('{locale}/blog', 'Blog::index', ['as' => 'blog']);

// then try the redirect
return redirect()->to('blog'); 


No, this redirect does not work from the Library class.
I tried to use header() and it works only with exit()

PHP Code:

header('Location: '. base_url($redirect_url));
exit(); 


I created, as a temporary solution, a function in helper:

PHP Code:

function redirect_to_page($page) {
    header('Location: '. $page);
    exit();
} 


I am using it in the library class:

PHP Code:

redirect_to_page(base_url($redirect_url)); 


It would be better to use CodeIgniter methods, but so far I could not find a solution.