Boolean indicating whether the response body has changed.
If false, then a valid 304 Not Modified response has been received, and you can reuse the old
cached response body.
If true, you should use new response's body (if present), or make another request to the origin
server without any conditional headers (i.e. don't use revalidationHeaders() this time) to get
the new resource.
Boolean indicating whether the response body has changed.
false, then a valid 304 Not Modified response has been received, and you can reuse the old cached response body.true, you should use new response's body (if present), or make another request to the origin server without any conditional headers (i.e. don't userevalidationHeaders()this time) to get the new resource.