Scope used for lazy initialization

scope.dart

import 'package:flutter/material.dart';

class SettingsBloc {
  void close() {}
}

/// {@template settings_scope}
/// SettingsScope widget.
/// {@endtemplate}
class SettingsScope extends StatefulWidget {
  /// {@macro settings_scope}
  const SettingsScope({
    required this.child,
    super.key, // ignore: unused_element
  });

  final Widget child;

  /// You can also add listen parameter to listen to changes in the bloc.
  static SettingsBloc of(BuildContext context) => context
      .getInheritedWidgetOfExactType<_DependencyAInherited>()!
      .settingsScopeState
      .settingsBloc;

  @override
  State<SettingsScope> createState() => _SettingsScopeState();
}

/// State for widget SettingsScope.
class _SettingsScopeState extends State<SettingsScope> {
  late final settingsBloc = SettingsBloc();

  @override
  void dispose() {
    // Control the lifecycle
    settingsBloc.close();
    super.dispose();
  }

  /// If you want to notify about changes in the bloc, wrap it in bloc builder
  @override
  Widget build(BuildContext context) => _DependencyAInherited(
        settingsScopeState: this,
        child: widget.child,
      );
}

/// {@template dependency_a_inherited}
/// _DependencyAInherited widget.
/// {@endtemplate}
class _DependencyAInherited extends InheritedWidget {
  /// {@macro dependency_a_inherited}
  const _DependencyAInherited({
    required this.settingsScopeState,
    required super.child,
    super.key, // ignore: unused_element
  });

  final _SettingsScopeState settingsScopeState;

  @override
  bool updateShouldNotify(covariant _DependencyAInherited oldWidget) => false;
}