public static function save_order_items() {
		check_ajax_referer( 'order-item', 'security' );

		if ( ! current_user_can( 'edit_shop_orders' ) || ! isset( $_POST['order_id'], $_POST['items'] ) ) {
			wp_die( -1 );
		}

		if ( isset( $_POST['order_id'], $_POST['items'] ) ) {
			$order_id = absint( $_POST['order_id'] );

			// Parse the jQuery serialized items.
			$items = array();
			parse_str( wp_unslash( $_POST['items'] ), $items ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized

			// Save order items.
			wc_save_order_items( $order_id, $items );

			// Return HTML items.
			$order = wc_get_order( $order_id );

			// Get HTML to return.
			ob_start();
			include 'admin/meta-boxes/views/html-order-items.php';
			$items_html = ob_get_clean();

			ob_start();
			$notes = wc_get_order_notes( array( 'order_id' => $order_id ) );
			include 'admin/meta-boxes/views/html-order-notes.php';
			$notes_html = ob_get_clean();

			wp_send_json_success(
				array(
					'html'       => $items_html,
					'notes_html' => $notes_html,
				)
			);
		}
		wp_die();
	}