1. override
Future<Response> delete(url, { Map<String, String> headers })

Sends an HTTP DELETE request with the given headers to the given URL, which can be a Uri or a String.

For more fine-grained control over the request, use send instead.

Source 

@override
Future<Response> delete(dynamic url, {Map<String, String> headers}) =>
  _sendUnstreamed("DELETE", url, headers);