createHttpClient method
Returns a new HttpClient using the given context.
When this override is installed, this function overrides the behavior of
new HttpClient.
Implementation
@override
HttpClient createHttpClient(SecurityContext? context) {
final innerClient = _previousOverrides != null
? _previousOverrides!.createHttpClient(context)
: super.createHttpClient(context);
return _TrackingHttpClient(innerClient, _tracker);
}