Add new functions to Redis Handler

What is the proper way to add thoses function to the Redis Handler whithout writing it in the System\Cache\Handlers\RedisHandler.php file ?

PHP Code:

    public function getKeys( string $keys = "*" )
    {
        return $this->redis->keys($keys);
    }

    //--------------------------------------------------------------------
    
    public function delWildcard( string $keys )
    {
        if (!$keys || $keys === "*") return false;
        
        $this->redis->del(
            $this->redis->keys($keys)
        );
    } 


I read this from the Documentation here https://codeigniter4.github.io/userguide...asses.html but i have to admit that i don't fully understand how it work.

Can anyone describe me how i can do please ?