feat(dart): update example

Author: techouse

clients/algoliasearch-client-dart/packages/chopper_requester/example/example.dart

@@ -1,13 +1,22 @@
+import 'dart:io' show HttpClient;
+
 import 'package:algolia_chopper_requester/algolia_chopper_requester.dart';
 import 'package:algolia_client_core/algolia_client_core.dart';
+import 'package:http/http.dart' as http show Client;
+import 'package:http/io_client.dart' show IOClient;
 
 void main() async {
   const String appId = 'latency';
   const String apiKey = '6be0576ff61c053d5f9a3225e2a90f76';
 
+  // Create a custom http [Client] with a connection timeout of 30 seconds
+  final http.Client client = IOClient(
+    HttpClient()..connectionTimeout = const Duration(seconds: 30),
+  );
+
   // Creating an instance of the RetryStrategy with necessary parameters.
   // This will retry the failed requests with a backoff strategy.
-  final requester = RetryStrategy.create(
+  final RetryStrategy requester = RetryStrategy.create(
     segment: AgentSegment(value: 'CustomClient'),
     appId: appId,
     apiKey: apiKey,
@@ -19,12 +28,13 @@ void main() async {
       requester: ChopperRequester(
         appId: appId,
         apiKey: apiKey,
+        client: client,
       ),
     ),
   );
 
   // Executing a GET request on the '/1/indexes/instant_search' endpoint.
-  final response = await requester.execute(
+  final Map<String, dynamic> response = await requester.execute(
     request: ApiRequest(
       method: RequestMethod.get,
       path: '/1/indexes/instant_search',
@@ -37,4 +47,7 @@ void main() async {
 
   // Dispose of the requester to clean up its resources.
   requester.dispose();
+
+  // Disposing a custom client has to be done manually.
+  client.close();
 }