description property Null safety

1. baguette
2. AtlasWindow
3. AtlasWindow
4. description property

AtlasWindow class

1. Constructors
2. AtlasWindow
3. Properties
4. description
5. hashCode
6. onPress
7. runtimeType
8. title
9. Methods
10. noSuchMethod
11. toString
12. Operators
13. operator ==