GZipEncoder constructor Null safety

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

GZipEncoder class

1. Constructors
2. GZipEncoder
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. encode
8. noSuchMethod
9. toString
10. Operators
11. operator ==
12. Constants
13. DEFLATE
14. FLAG_COMMENT
15. FLAG_EXTRA
16. FLAG_HCRC
17. FLAG_NAME
18. FLAG_TEXT
19. OS_ACORN_RISCOS
20. OS_AMIGA
21. OS_ATARI_TOS
22. OS_CP_M
23. OS_FAT
24. OS_HPFS
25. OS_MACINTOSH
26. OS_NTFS
27. OS_QDOS
28. OS_TOPS_20
29. OS_UNIX
30. OS_UNKNOWN
31. OS_VM_CMS
32. OS_VMS
33. OS_Z_SYSTEM
34. SIGNATURE