public static function shipping_zone_methods_save_settings() {
		if ( ! isset( $_POST['wc_shipping_zones_nonce'], $_POST['instance_id'], $_POST['data'] ) ) {
			wp_send_json_error( 'missing_fields' );
			wp_die();
		}

		if ( ! wp_verify_nonce( wp_unslash( $_POST['wc_shipping_zones_nonce'] ), 'wc_shipping_zones_nonce' ) ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
			wp_send_json_error( 'bad_nonce' );
			wp_die();
		}

		if ( ! current_user_can( 'manage_woocommerce' ) ) {
			wp_send_json_error( 'missing_capabilities' );
			wp_die();
		}

		$instance_id     = absint( $_POST['instance_id'] );
		$zone            = WC_Shipping_Zones::get_zone_by( 'instance_id', $instance_id );
		$shipping_method = WC_Shipping_Zones::get_shipping_method( $instance_id );
		$shipping_method->set_post_data( wp_unslash( $_POST['data'] ) ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		$shipping_method->process_admin_options();

		WC_Cache_Helper::get_transient_version( 'shipping', true );

		wp_send_json_success(
			array(
				'zone_id'   => $zone->get_id(),
				'zone_name' => $zone->get_zone_name(),
				'methods'   => $zone->get_shipping_methods( false, 'json' ),
				'errors'    => $shipping_method->get_errors(),
			)
		);
	}