plugin_url() ) . '/assets/images/shipping_providers/bulgarian-posts.png'; } /** * Get the tracking URL for a given tracking number. * * @param string $tracking_number The tracking number. * @return string The tracking URL. */ public function get_tracking_url( string $tracking_number ): string { return 'https://www.bulgarianposts.bg/en/track-and-trace?trackingNumber=' . $tracking_number; } }