diff --git a/example/assets/preview_config.json b/example/assets/preview_config.json
index 5607fa4..6894852 100644
--- a/example/assets/preview_config.json
+++ b/example/assets/preview_config.json
@@ -26,6 +26,34 @@
                     }
                },
                "children": {
+                    "utils": {
+                         "id": "utils",
+                         "route": "widgets/utils",
+                         "builtComponents": {},
+                         "children": {
+                              "bottom": {
+                                   "id": "bottom",
+                                   "route": "widgets/utils/bottom",
+                                   "builtComponents": {
+                                        "./example/lib/catalog/widgets/utils/bottom/fab_widget.dart": {
+                                             "path": "./example/lib/catalog/widgets/utils/bottom/fab_widget.dart",
+                                             "route": "widgets/utils/bottom",
+                                             "package": "package:example/catalog/widgets/utils/bottom/fab_widget.dart",
+                                             "clazzName": "FabWidgetPreviewPreviewPageDummy",
+                                             "preview": {
+                                                  "id": "fab_widget",
+                                                  "path": "widgets/utils/bottom",
+                                                  "description": "Basic fab widget",
+                                                  "parameters": [
+                                                       "incrementCounter"
+                                                  ]
+                                             }
+                                        }
+                                   },
+                                   "children": {}
+                              }
+                         }
+                    },
                     "screen": {
                          "id": "screen",
                          "route": "widgets/screen",
@@ -45,20 +73,6 @@
                                         ]
                                    }
                               },
-                              "./example/lib/catalog/widgets/screen/fab_widget.dart": {
-                                   "path": "./example/lib/catalog/widgets/screen/fab_widget.dart",
-                                   "route": "widgets/screen",
-                                   "package": "package:example/catalog/widgets/screen/fab_widget.dart",
-                                   "clazzName": "FabWidgetPreviewPreviewPageDummy",
-                                   "preview": {
-                                        "id": "fab_widget",
-                                        "path": "widgets/screen",
-                                        "description": "Basic fab widget",
-                                        "parameters": [
-                                             "incrementCounter"
-                                        ]
-                                   }
-                              },
                               "./example/lib/catalog/widgets/screen/counter_widget.dart": {
                                    "path": "./example/lib/catalog/widgets/screen/counter_widget.dart",
                                    "route": "widgets/screen",
diff --git a/example/lib/catalog/catalog_component.dart b/example/lib/catalog/catalog_component.dart
index 7911280..bbed7f9 100644
--- a/example/lib/catalog/catalog_component.dart
+++ b/example/lib/catalog/catalog_component.dart
@@ -4,7 +4,15 @@ import 'package:flutter/material.dart';
 import 'package:catalog/catalog.dart';
 
 
-import 'package:example/catalog/widgets/screen/body_widget.dart';import 'package:example/catalog/widgets/screen/fab_widget.dart';import 'package:example/catalog/widgets/screen/counter_widget.dart';
+import 'package:example/catalog/widgets/utils/bottom/fab_widget.dart';
+
+    
+
+
+
+    
+
+import 'package:example/catalog/widgets/screen/body_widget.dart';import 'package:example/catalog/widgets/screen/counter_widget.dart';
 
     
 
@@ -45,7 +53,16 @@ class CatalogComponent extends StatefulWidget {
          
             ,
                     GoRoute(
-          path: 'screen',
+          path: 'utils',
+          redirect: (context, state) {
+            if (state.fullPath != state.matchedLocation) return null;
+            return CatalogComponent.routeName;
+          },
+          routes: [
+             
+            
+                    GoRoute(
+          path: 'bottom',
           redirect: (context, state) {
             if (state.fullPath != state.matchedLocation) return null;
             return CatalogComponent.routeName;
@@ -53,19 +70,34 @@ class CatalogComponent extends StatefulWidget {
           routes: [
                      
         GoRoute(
-          path: BodyWidgetPreviewPreviewPageDummy.routeName,
+          path: FabWidgetPreviewPreviewPageDummy.routeName,
           pageBuilder: (context, state) => NoTransitionPage(
             key: state.pageKey,
-            child: const BodyWidgetPreviewPreviewPageDummy(),
+            child: const FabWidgetPreviewPreviewPageDummy(),
           ),
         )
         
-         ,        
+         
+            ,
+            
+          ],
+        )
+  
+          ],
+        )
+  ,        GoRoute(
+          path: 'screen',
+          redirect: (context, state) {
+            if (state.fullPath != state.matchedLocation) return null;
+            return CatalogComponent.routeName;
+          },
+          routes: [
+                     
         GoRoute(
-          path: FabWidgetPreviewPreviewPageDummy.routeName,
+          path: BodyWidgetPreviewPreviewPageDummy.routeName,
           pageBuilder: (context, state) => NoTransitionPage(
             key: state.pageKey,
-            child: const FabWidgetPreviewPreviewPageDummy(),
+            child: const BodyWidgetPreviewPreviewPageDummy(),
           ),
         )
         
diff --git a/example/lib/catalog/widgets/screen/fab_widget.dart b/example/lib/catalog/widgets/utils/bottom/fab_widget.dart
similarity index 86%
rename from example/lib/catalog/widgets/screen/fab_widget.dart
rename to example/lib/catalog/widgets/utils/bottom/fab_widget.dart
index 23f91ac..0fc351c 100644
--- a/example/lib/catalog/widgets/screen/fab_widget.dart
+++ b/example/lib/catalog/widgets/utils/bottom/fab_widget.dart
@@ -1,7 +1,7 @@
 /// AUTOGENERATED FILE. DO NOT EDIT
 
 import 'package:flutter/material.dart';
-import 'package:example/widgets/screen/catalog/preview/fab_widget.preview.dart';
+import 'package:example/widgets/utils/bottom/catalog/preview/fab_widget.preview.dart';
 
 class FabWidgetPreviewPreviewPageDummy extends StatefulWidget {
 
diff --git a/example/lib/widgets/main_screen.dart b/example/lib/widgets/main_screen.dart
index bd4f88e..9809d36 100644
--- a/example/lib/widgets/main_screen.dart
+++ b/example/lib/widgets/main_screen.dart
@@ -2,7 +2,7 @@ import 'package:catalog/catalog.dart';
 import 'package:flutter/material.dart';
 
 import 'screen/body_widget.dart';
-import 'screen/fab_widget.dart';
+import 'utils/bottom/fab_widget.dart';
 
 @Preview(
   parameters: [
diff --git a/example/lib/widgets/screen/catalog/dummy/fab_widget.dummy.dart b/example/lib/widgets/utils/bottom/catalog/dummy/fab_widget.dummy.dart
similarity index 100%
rename from example/lib/widgets/screen/catalog/dummy/fab_widget.dummy.dart
rename to example/lib/widgets/utils/bottom/catalog/dummy/fab_widget.dummy.dart
diff --git a/example/lib/widgets/screen/catalog/preview/fab_widget.preview.dart b/example/lib/widgets/utils/bottom/catalog/preview/fab_widget.preview.dart
similarity index 98%
rename from example/lib/widgets/screen/catalog/preview/fab_widget.preview.dart
rename to example/lib/widgets/utils/bottom/catalog/preview/fab_widget.preview.dart
index 4b97fd2..d18edaa 100644
--- a/example/lib/widgets/screen/catalog/preview/fab_widget.preview.dart
+++ b/example/lib/widgets/utils/bottom/catalog/preview/fab_widget.preview.dart
@@ -2,7 +2,7 @@
 
 import 'package:catalog/catalog.dart';
 import 'package:flutter/material.dart';
-import 'package:example/widgets/screen/fab_widget.dart';
+import 'package:example/widgets/utils/bottom/fab_widget.dart';
 import '../dummy/fab_widget.dummy.dart';
 
 @Preview(
diff --git a/example/lib/widgets/screen/fab_widget.dart b/example/lib/widgets/utils/bottom/fab_widget.dart
similarity index 100%
rename from example/lib/widgets/screen/fab_widget.dart
rename to example/lib/widgets/utils/bottom/fab_widget.dart
diff --git a/lib/src/annotations/internal_preview.dart b/lib/src/annotations/internal_preview.dart
new file mode 100644
index 0000000..260dacc
--- /dev/null
+++ b/lib/src/annotations/internal_preview.dart
@@ -0,0 +1,66 @@
+import 'dart:convert';
+
+import 'package:catalog/src/base/serial.dart';
+
+class InternalPreview implements Serial<InternalPreview> {
+  final String id;
+  final String path;
+  final String description;
+  final List<String> parameters;
+
+  const InternalPreview({
+    this.id = '',
+    this.path = '',
+    this.description = '',
+    this.parameters = const [],
+  });
+
+  @override
+  InternalPreview fromJson(Map<String, dynamic> json) => InternalPreview(
+        id: json['id'] ?? '',
+        path: json['path'] ?? '',
+        description: json['description'] ?? '',
+        parameters: Serial.listObjectFromBasicType<String>(
+          json['parameters'] ?? [],
+        ),
+      );
+
+  @override
+  String getId() => id;
+
+  @override
+  InternalPreview instance() => const InternalPreview(id: '', path: '');
+
+  @override
+  Map<String, dynamic> toJson() => {
+        'id': id,
+        'path': path,
+        'description': description,
+        'parameters': parameters,
+      };
+
+  @override
+  InternalPreview fromString(String value) {
+    Map<String, dynamic> map = jsonDecode(value);
+    return fromJson(map);
+  }
+
+  @override
+  String stringValue() {
+    var map = toJson();
+    return jsonEncode(map);
+  }
+
+  InternalPreview copyWith({
+    String? id,
+    String? path,
+    String? description,
+    List<String>? parameters,
+  }) =>
+      InternalPreview(
+        id: id ?? this.id,
+        path: path ?? this.path,
+        description: description ?? this.description,
+        parameters: parameters ?? this.parameters,
+      );
+}
diff --git a/lib/src/base/serial.dart b/lib/src/base/serial.dart
index 8e0739f..25b6f35 100644
--- a/lib/src/base/serial.dart
+++ b/lib/src/base/serial.dart
@@ -1,5 +1,6 @@
 import 'dart:convert';
 
+import 'package:catalog/src/annotations/internal_preview.dart';
 import 'package:catalog/src/annotations/preview.dart';
 import 'package:catalog/src/builders/catalog/built_component.dart';
 import 'package:catalog/src/builders/catalog/component_node.dart';
@@ -79,6 +80,7 @@ abstract class Serial<T> {
     ComponentNode(),
     BuiltComponent(),
     const Preview(id: '', path: ''),
+    const InternalPreview(id: '', path: ''),
   ];
 
   static Map<String, dynamic> internalLinkerToMap(map) {
diff --git a/lib/src/bin/catalog_builder/catalog_builder.dart b/lib/src/bin/catalog_builder/catalog_builder.dart
index 7854507..4cb73d7 100644
--- a/lib/src/bin/catalog_builder/catalog_builder.dart
+++ b/lib/src/bin/catalog_builder/catalog_builder.dart
@@ -1,6 +1,6 @@
 import 'dart:io';
 
-import 'package:catalog/src/annotations/preview.dart';
+import 'package:catalog/src/annotations/internal_preview.dart';
 import 'package:catalog/src/builders/catalog/built_component.dart';
 import 'package:catalog/src/builders/catalog/component_node.dart';
 import 'package:catalog/src/extensions/string_ext.dart';
@@ -22,7 +22,7 @@ Future<BuiltComponent?> createPage(
   String outputPath,
   String outputFile,
   String prefix,
-  Preview preview,
+  InternalPreview preview,
   String import,
   String name,
 ) async {
diff --git a/lib/src/bin/preview_builder/preview_builder.dart b/lib/src/bin/preview_builder/preview_builder.dart
index fb2dca8..86fc331 100644
--- a/lib/src/bin/preview_builder/preview_builder.dart
+++ b/lib/src/bin/preview_builder/preview_builder.dart
@@ -1,6 +1,6 @@
 import 'dart:io';
 
-import 'package:catalog/src/annotations/preview.dart';
+import 'package:catalog/src/annotations/internal_preview.dart';
 
 Future<String?> findClassName(String path) async {
   try {
@@ -20,7 +20,7 @@ Future<void> generatePreview(
   String previewAnnotation,
   String className,
   String prefix,
-  Preview preview,
+  InternalPreview preview,
 ) async {
   var clazz = className.replaceAll('()', '');
 
@@ -168,7 +168,7 @@ String dummyWidgetBuilder(String clazz, String widgetCompose) {
   ''';
 }
 
-String dummyWidgetContent(String className, Preview preview) {
+String dummyWidgetContent(String className, InternalPreview preview) {
   var clazz = className.replaceAll('()', '');
 
   var widgetCompose = '$clazz(';
diff --git a/lib/src/bin/utils/configuration.dart b/lib/src/bin/utils/configuration.dart
index 73f8c69..cc3be26 100644
--- a/lib/src/bin/utils/configuration.dart
+++ b/lib/src/bin/utils/configuration.dart
@@ -1,7 +1,7 @@
 import 'dart:convert';
 import 'dart:io';
 
-import 'package:catalog/src/annotations/preview.dart';
+import 'package:catalog/src/annotations/internal_preview.dart';
 import 'package:yaml/yaml.dart';
 
 import 'exceptions.dart';
@@ -74,7 +74,7 @@ String loadId(String basePath) {
   return yamlMap[nammeId];
 }
 
-Future<Preview?> previewOnFile(
+Future<InternalPreview?> previewOnFile(
   String basePath,
   dynamic config,
   String originalFilePath,
@@ -172,8 +172,12 @@ void main(List<String> arguments) async {
 
     var path = file.absolute.path;
     var result = await Process.run('dart', ['run', path]);
-    var preview =
-        const Preview(id: '', path: '').fromJson(jsonDecode(result.stdout));
+    var preview = const InternalPreview(
+      id: '',
+      path: '',
+    ).fromJson(
+      jsonDecode(result.stdout),
+    );
 
     if (preview.id.isEmpty) {
       preview = preview.copyWith(
diff --git a/lib/src/builders/catalog/built_component.dart b/lib/src/builders/catalog/built_component.dart
index 8cf9251..3024bb1 100644
--- a/lib/src/builders/catalog/built_component.dart
+++ b/lib/src/builders/catalog/built_component.dart
@@ -1,4 +1,4 @@
-import 'package:catalog/src/annotations/preview.dart';
+import 'package:catalog/src/annotations/internal_preview.dart';
 import 'package:catalog/src/base/serial.dart';
 
 class BuiltComponent extends Serial<BuiltComponent> {
@@ -6,7 +6,7 @@ class BuiltComponent extends Serial<BuiltComponent> {
   String route = '';
   String package = '';
   String clazzName = '';
-  Preview? preview;
+  InternalPreview? preview;
 
   String get name {
     if (!path.contains('/')) return path;
@@ -35,7 +35,8 @@ class BuiltComponent extends Serial<BuiltComponent> {
     package = json['package'] ?? '';
     clazzName = json['clazzName'] ?? '';
     if (json['preview'] != null) {
-      preview = const Preview(id: '', path: '').fromJson(json['preview'] ?? {});
+      preview = const InternalPreview(id: '', path: '')
+          .fromJson(json['preview'] ?? {});
     }
     return this;
   }