collection_ids: Optional filter. You can now filter collections by a comma-separated list of Collection IDs.
collection_names: Optional filter. You can now filter collections by a comma-separated list of Collection Names. (Note: The space character can be sent as " ", "%20" or "+")
New fields in the response are being returned:
Product "identifier" and Product "external_id" for each Product under the "items" section in the response.
Sku "identifier" and Sku "external_id" for each SKU under the "skus" section in the response.
An inventory object has been added within the line_item_sku object in the responses for order line item endpoints to indicate warehouse delivery dates.