returnByID

{
    "input":{
        "orderId": "b380dcf1-1d68-48c7-b70c-ff0f7d63bcf5",
        "returnId": "cdb475e6-466d-4def-a5fa-602e1fa7d8e3"
    }
}

query ReturnById($input: ReturnByIdInput!) {
  returnByID(input: $input) {
    ...on ReturnAmazon {
        marketplace
        amazonOrderId
        lineItems {
            status
            productId
            quantity
        }
    }
    ...on ReturnShopify {
        marketplace
        orderId
        lineItems {
            status
            variantId
            quantity
            currencyCode
            price
        }
    }
  }
}

{
    "data": {
        "returnByID": {
            "marketplace": "SHOPIFY",
            "orderId": "5776005693737",
            "lineItems": [
                {
                    "status": "RETURN_CLOSED",
                    "variantId": "46579981844777",
                    "quantity": 1,
                    "currencyCode": "USD",
                    "price": "24.99"
                }
            ]
        }
    }
}