packages/wyatt_ui_components/example/lib/main.dart

@@ -50,7 +50,7 @@ class Home extends StatelessWidget {
   Widget build(BuildContext context) => Scaffold(
         appBar: PreferredSize(
           preferredSize: const Size.fromHeight(60),
-          child: context.components.appBar.configure(title: 'Example title'),
+          child: context.components.appBar?.configure(title: 'Example title'),
         ),
         body: Column(
           children: [

packages/wyatt_ui_components/lib/src/domain/entities/component.dart

@@ -19,5 +19,5 @@ import 'package:flutter/material.dart';
 abstract class Component extends StatelessWidget {
   const Component({super.key});
 
-  Component configure();
+  Component? configure();
 }

packages/wyatt_ui_components/lib/src/domain/entities/components.dart

@@ -29,7 +29,7 @@ abstract class AppBarComponent extends Component {
   });
 
   @override
-  AppBarComponent configure({
+  AppBarComponent? configure({
     String? title,
     Widget? leading,
     List<Widget>? actions,
@@ -46,7 +46,7 @@ abstract class BottomNavigationBarComponent extends Component {
   });
 
   @override
-  BottomNavigationBarComponent configure({
+  BottomNavigationBarComponent? configure({
     void Function(BuildContext, int)? onTap,
     int currentIndex = 0,
   });
@@ -57,7 +57,7 @@ abstract class ErrorWidgetComponent extends Component {
   const ErrorWidgetComponent({required this.error, super.key});
 
   @override
-  ErrorWidgetComponent configure({String? error});
+  ErrorWidgetComponent? configure({String? error});
 }
 
 abstract class LoadingWidgetComponent extends Component {
@@ -65,5 +65,5 @@ abstract class LoadingWidgetComponent extends Component {
   const LoadingWidgetComponent({required this.color, super.key});
 
   @override
-  LoadingWidgetComponent configure({Color? color});
+  LoadingWidgetComponent? configure({Color? color});
 }

packages/wyatt_ui_components/lib/src/features/component_theme_data.dart

@@ -17,15 +17,15 @@
 import 'package:wyatt_ui_components/src/domain/entities/components.dart';
 
 class ComponentThemeData {
-  final AppBarComponent appBar;
-  final BottomNavigationBarComponent bottomNavigationBar;
-  final ErrorWidgetComponent errorWidget;
-  final LoadingWidgetComponent loadingWidget;
+  final AppBarComponent? appBar;
+  final BottomNavigationBarComponent? bottomNavigationBar;
+  final ErrorWidgetComponent? errorWidget;
+  final LoadingWidgetComponent? loadingWidget;
 
   const ComponentThemeData.raw({
-    required this.appBar,
-    required this.bottomNavigationBar,
-    required this.errorWidget,
-    required this.loadingWidget,
+    this.appBar,
+    this.bottomNavigationBar,
+    this.errorWidget,
+    this.loadingWidget,
   });
 }