Effect constructor Null safety

1. cloudinary_url_gen
2. effect
3. Effect
4. Effect constructor

Effect class

1. Constructors
2. Effect
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. accelerate
13. advancedRedEye
14. artisticFilter
15. assistColorBlind
16. backgroundRemoval
17. blackwhite
18. blur
19. boomerang
20. cartoonify
21. colorize
22. deshake
23. dither
24. dropShadow
25. fadeIn
26. fadeOut
27. gradientFade
28. grayscale
29. loop
30. makeTransparent
31. negate
32. noise
33. oilPaint
34. outline
35. pixelate
36. redEye
37. removeBackground
38. reverse
39. sepia
40. shadow
41. simulateColorBlind
42. theme
43. vectorize
44. vignette