zeienko-vitalii

Modifier	Instantiate?	Extend?	Implement?	External Use?	Pro Tips
Abstract	❌	✅	✅	✅	Factory constructors mimic instantiation!
Base	✅	✅ (base/final/sealed only)	❌	✅	Ensure consistent inherited behavior!
Interface	✅	❌	✅	✅	Ideal for contracts without forced inheritance!
Final	✅	❌	❌	✅	Maximize API stability and avoid surprises!
Sealed	❌	✅ (internal only)	❌	✅	Perfect for exhaustive type safety!
Mixin	❌	✅	✅	✅	Combine multiple mixins for modularity and code reuse!

zeienko-vitalii

import 'package:ferry/ferry.dart';
import 'package:gql_http_link/gql_http_link.dart';
import 'package:simple_articles_app/utils/logger.dart';

const String baseUrl =
    'https://api-eu-central-1.graphcms.com/v2/ckl4xdv123tnhmkc/master';

class GraphQlClient {
  /// Initialises [_client] with setting cache store
  factory GraphQlClient() {