Interface MacklinMsdsSearchResponse

data payload of the MSDS search endpoint (/api/msds/search?keyword=<item_code>), as returned by request<T> after it unwraps the { code, message, data } envelope. Only the code: 200 response carries data.url; error responses (e.g. code 1104 "MSDS temporarily does not exist", code 201 "please enter a valid item number") return data: [], which lacks url.