ForwardingFile constructor Null safety

1. Flutter
2. file
3. ForwardingFile
4. ForwardingFile constructor

ForwardingFile class

1. Constructors
2. ForwardingFile
3. Properties
4. absolute
5. basename
6. delegate
7. dirname
8. fileSystem
9. hashCode
10. isAbsolute
11. parent
12. path
13. runtimeType
14. uri
15. Methods
16. copy
17. copySync
18. create
19. createSync
20. delete
21. deleteSync
22. exists
23. existsSync
24. lastAccessed
25. lastAccessedSync
26. lastModified
27. lastModifiedSync
28. length
29. lengthSync
30. noSuchMethod
31. open
32. openRead
33. openSync
34. openWrite
35. readAsBytes
36. readAsBytesSync
37. readAsLines
38. readAsLinesSync
39. readAsString
40. readAsStringSync
41. rename
42. renameSync
43. resolveSymbolicLinks
44. resolveSymbolicLinksSync
45. setLastAccessed
46. setLastAccessedSync
47. setLastModified
48. setLastModifiedSync
49. stat
50. statSync
51. toString
52. watch
53. wrap
54. wrapDirectory
55. wrapFile
56. wrapLink
57. writeAsBytes
58. writeAsBytesSync
59. writeAsString
60. writeAsStringSync
61. Operators
62. operator ==