Check for gift card ownership

I see that there’s a function named is_owner() in the class-yith-ywgc-gift-card.php file that is designed to check for gift card ownership, but right now it returns true. Do you plan to implement this check in the future? Or is this function available only in the premium version of the plugin?

public function is_owner( $user ) {
    //todo perform a real check for gift card ownership
    return true;
}

Thanks