---
title: ChangingCartLine from an Object to an Interface - Shopify developer changelog
description: Shopify’s developer changelog documents all changes to Shopify’s platform. Find the latest news and learn about new platform opportunities.
source_url:
  html: https://shopify.dev/changelog/changing-cartline-from-an-object-to-an-interface
  md: https://shopify.dev/changelog/changing-cartline-from-an-object-to-an-interface.md
---

[Back to Developer changelog](https://shopify.dev/changelog)

April 1, 2023

Tags:

* Action Required
* API
* 2023-04

# Changing`CartLine` from an `Object` to an `Interface`

As part of the GraphQL Storefront API **2023-04** API release, we are creating `BaseCartLine` as an interface to `CartLine` and we are updating `CartLineConnection` to `BaseCartLineConnection`.

Learn more about the `Cart` object on [Shopify.dev](https://shopify.dev/api/storefront/unstable/objects/Cart#top).