Changes to Search

the request property refs became not nullable

the response property list/items/callbackTimeout became nullable for the status 200

the response property list/items/createdAt became nullable for the status 200

the response property list/items/deletedAt became nullable for the status 200

the response property list/items/updatedAt became nullable for the status 200

added the optional property list/items/callbackTimeout to the response with the 200 status

endpoint added