headers top-level property

dynamic headers
getter/setter pair

Implementation

dynamic headers = {
  'User-Agent': 'OkHttp-${DateTime.now().millisecondsSinceEpoch}',
  'Accept': '*/*',
  'Cache-Control': 'no-cache',
  'Host': 'www.speedtest.net',
  'Accept-Encodeing': 'gzip, deflate, br',
  'Connection': 'keep-alive',
  'Cookie':
      '__cf_bm=cYL8QIj7ddb0WZKwE1R0wYeomPSg4lZWzVCUBasR4BA-${DateTime.now().millisecondsSinceEpoch}-1.0.1.1-6dRis9b5GHNBFyWLybbUAINEcsGA.89S5PRfqCpNne36R8fqHKzCSiyfFqIA.irf9D7yOkJSsYh1fRyyc9qzWw',
};