head function
Sends an HTTP HEAD request with the given headers to the given URL.
This automatically initializes a new Client and closes that client once the request is complete. If you're planning on making multiple requests to the same server, you should use a single Client for all of those requests.
For more fine-grained control over the request, use Request instead.
Implementation
Future<Response> head(Uri url, {Map<String, String>? headers}) =>
_withClient((client) => client.head(url, headers: headers));