protected function instance_settings_screen( $instance_id ) {
		$zone            = WC_Shipping_Zones::get_zone_by( 'instance_id', $instance_id );
		$shipping_method = WC_Shipping_Zones::get_shipping_method( $instance_id );

		if ( ! $shipping_method ) {
			wp_die( esc_html__( 'Invalid shipping method!', 'woocommerce' ) );
		}
		if ( ! $zone ) {
			wp_die( esc_html__( 'Zone does not exist!', 'woocommerce' ) );
		}
		if ( ! $shipping_method->has_settings() ) {
			wp_die( esc_html__( 'This shipping method does not have any settings to configure.', 'woocommerce' ) );
		}

		if ( ! empty( $_POST['save'] ) ) { // WPCS: input var ok, sanitization ok.

			if ( empty( $_REQUEST['_wpnonce'] ) || ! wp_verify_nonce( wp_unslash( $_REQUEST['_wpnonce'] ), 'woocommerce-settings' ) ) { // WPCS: input var ok, sanitization ok.
				echo '<div class="updated error"><p>' . esc_html__( 'Edit failed. Please try again.', 'woocommerce' ) . '</p></div>';
			}

			$shipping_method->process_admin_options();
			$shipping_method->display_errors();
		}

		include_once dirname( __FILE__ ) . '/views/html-admin-page-shipping-zones-instance.php';
	}