Custom view method

In CI3, I created a custom view method (cView) by extending CI_Loader :

// My controller, log user data and search queries
class MY_Loader extends CI_Loader
{
    public function __construct()
    {
        parent::__construct();
    }
   
    // Custom view loader, load and return the view if display is true
    public function cView($view, $vars = array(), $display = TRUE)
    {
        if (!$display) return '';
        return $this->view($view, $vars, TRUE);
    }
}

Since CI_Loader and the core folder no longer exist, I can't figure out where I should create my custom cView function in CI4? The main constrain is that cView() calls the native view() method.