public function get_action_labels() {
        return array(
            'created'  => esc_html_x( 'Created', 'wordpress-seo', 'stream' ),
            'updated'  => esc_html_x( 'Updated', 'wordpress-seo', 'stream' ),
            'added'    => esc_html_x( 'Added', 'wordpress-seo', 'stream' ),