invalid_deprecated_implement_annotation
The annotation '@Deprecated.implement' can only be applied to implementable classes.
Description
#
The analyzer produces this diagnostic when the @Deprecated.implement
annotation is applied to a declaration that isn't an implementable class
or mixin. An implementable class or mixin is one that isn't declared with
the base, final, or sealed keywords.
Example
#The following code produces this diagnostic because the annotation is on a sealed class:
dart
@Deprecated.implement()
sealed class C {}
Common fixes
#Remove the annotation:
dart
sealed class C {}