Running Gradle task 'assembleRelease'...                        
flutter : lib/widgets/notification_banner.dart:15:9: Error: Expected '.' before this.
En línea: 1 Carácter: 48
+ ... ampp\htdocs\Viral\frontend'; flutter build apk --release 2>&1 | Tee-O ...
+                                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (lib/widgets/not....' before this.:String) [ 
   ], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 
    this->onTap,
        ^
lib/widgets/notification_banner.dart:15:9: Error: Expected an identifier, but got '-'.
Try inserting an identifier before '-'.
    this->onTap,
        ^
lib/widgets/notification_banner.dart:15:9: Error: Expected '}' before this.
    this->onTap,
        ^
lib/widgets/notification_banner.dart:16:19: Error: Undefined name 'key'.
  }) : super(key: key);
                  ^^^
lib/widgets/notification_banner.dart:137:11: Error: No named parameter with the name 
'title'.
          title: title,
          ^^^^^
lib/widgets/notification_banner.dart:10:9: Context: Found this candidate, but the 
arguments don't match.
  const NotificationBanner({
        ^^^^^^^^^^^^^^^^^^
lib/widgets/notification_banner.dart:5:16: Error: Final field 'title' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final String title;
               ^^^^^
lib/widgets/notification_banner.dart:6:16: Error: Final field 'body' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final String body;
               ^^^^
lib/widgets/notification_banner.dart:7:17: Error: Final field 'avatarUrl' is not 
initialized.
Try to initialize the field in the declaration or in every constructor.
  final String? avatarUrl;
                ^^^^^^^^^
lib/widgets/notification_banner.dart:8:23: Error: Final field 'onTap' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final VoidCallback? onTap;
                      ^^^^^
Target kernel_snapshot_program failed: Exception


FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileFlutterBuildRelease'.
> Process 'command 'C:\flutter\bin\flutter.bat'' finished with non-zero exit value 1

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.

BUILD FAILED in 17s
Running Gradle task 'assembleRelease'...                           18,0s
Gradle task assembleRelease failed with exit code 1