TarFileEncoder constructor Null safety

1. Flutter
2. archive_io
3. TarFileEncoder
4. TarFileEncoder constructor

TarFileEncoder class

1. Constructors
2. TarFileEncoder
3. Properties
4. hashCode
5. runtimeType
6. tarPath
7. Methods
8. addDirectory
9. addFile
10. close
11. create
12. noSuchMethod
13. open
14. tarDirectory
15. toString
16. Operators
17. operator ==
18. Constants
19. GZIP
20. STORE