Getting Specific Header value from Head call response in Flutter

I am performing Head call as below using http:

Future<void> fetchModifiedDate(String fileUrl,BuildContext context) async{
  if (await checkNetworkConnection(context)) {
  var responseValue = [];
  var response = http.head(Uri.parse(fileUrl));
  response.then((value) {
    responseValue = value.headers.values.toString().split(",");
    modifiedDate = responseValue[1].trim();
    print(value.headers.toString());
    print(value.headers.values.toString());
  });
}

The values which I am getting from Header is as below :

1. For print(value.hedaers.toString()),

{x-served-by: psm100.akshar-dev.ml, connection: keep-alive, last-modified: Thu, 13 Oct 2022 00:09:35 GMT, accept-ranges: bytes, date: Wed, 02 Nov 2022 10:24:35 GMT, content-length: 69910, etag: "6347573f-11116", content-type: application/json, server: openresty}

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2. For print(value.headers.values.toString()),

(psm100.akshar-dev.ml, keep-alive, Thu, 13 Oct 2022 00:09:35 GMT, …, application/json, openresty)

I want specific header value i.e. The value for last-modified key.
How can I get it?

>Solution :

Try the following code

value.hedaers['last-modified']