HUSKY - Products Filter Professional for WooCommerce

Using in taxonomy type extensions for adding its keys in system for to make the extension visible

Example:

add_filter('woof_add_html_types', array($this, 'woof_add_html_types'));

public function woof_add_html_types($types)
    {
        $types[$this->html_type] = __('Label', 'woocommerce-products-filter');
        return $types;
    }