WC_Admin_Duplicate_Product::__construct PHP Method

        public function __construct()
        {
            add_action('admin_action_duplicate_product', array($this, 'duplicate_product_action'));
            add_filter('post_row_actions', array($this, 'dupe_link'), 10, 2);
            add_action('post_submitbox_start', array($this, 'dupe_button'));
        }