AnnotationResult<T> constructor Null safety

1. Flutter
2. rendering
3. AnnotationResult<T>
4. AnnotationResult constructor

AnnotationResult class

1. Constructors
2. AnnotationResult
3. Properties
4. annotations
5. entries
6. hashCode
7. runtimeType
8. Methods
9. add
10. noSuchMethod
11. toString
12. Operators
13. operator ==