invalid_annotation_target
The annotation '{0}' can only be used on {1}.
Description
#The analyzer produces this diagnostic when an annotation is applied to a kind of declaration that it doesn't support.
Example
#The following code produces this diagnostic because the optionalTypeArgs annotation isn't defined to be valid for top-level variables:
dart
import 'package:meta/meta.dart';
@optionalTypeArgs
int x = 0;Common fixes
#Remove the annotation from the declaration.
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