import'package:http/http.dart'as http;import'package:http_interop_http/http_interop_http.dart';import'package:json_api/client.dart';import'package:json_api/routing.dart';voidmain()async {/// Define the server's base URLfinal baseUri='http://localhost:8080';/// Use the standard recommended URL structure or implement your ownfinal uriDesign=StandardUriDesign(Uri.parse(baseUri));/// This is the Dart's standard HTTP client.  /// Do not forget to close it in the end.final httpClient= http.Client();/// This is the interface which decouples this JSON:API implementation  /// from the HTTP client.  /// Learn more: https://pub.dev/packages/http_interopfinal httpHandler= httpClient.handleInterop;/// This is the basic JSON:API client. It is flexible but not very convenient  /// to use, because you would need to remember a lot of JSON:API protocol details.  /// We will use another wrapper on top of it.final jsonApiClient=Client(httpHandler);/// The[RoutingClient] is most likely the right choice.  /// It is called routing because it routes the calls to the correct  /// URLs depending on the use case. Take a look at its methods, they cover  /// all the standard scenarios specified by the JSON:API standard.final client=RoutingClient(uriDesign, jsonApiClient);try {/// Fetch the collection.    /// See other methods to query and manipulate resources.final response=await client.fetchCollection('colors');/// The fetched collection allows us to iterate over the resources    /// and to look into their attributesfor (final resourcein response.collection) {final {'name': name,'red': red,'green': green,'blue': blue,      }= resource.attributes;print('${resource.type}:${resource.id}');print('$name - $red:$green:$blue');    }  }onRequestFailurecatch (e) {/// Catch error responsefor (final errorin e.errors) {print(error.title);    }  }/// Free up the resources before exit.  httpClient.close();}