ImageFormatCode constructor Null safety

1. face_sdk
2. face_sdk
3. ImageFormatCode
4. ImageFormatCode const constructor

ImageFormatCode enum

1. Constructors
2. ImageFormatCode
3. Values
4. IMAGE_FORMAT_JPG
5. IMAGE_FORMAT_PNG
6. IMAGE_FORMAT_TIF
7. IMAGE_FORMAT_BMP
8. Properties
9. hashCode
10. index
11. runtimeType
12. Methods
13. noSuchMethod
14. toString
15. Operators
16. operator ==
17. Constants
18. values