base32 constructor Null safety

1. base32
2. base32
3. base32
4. base32 constructor

base32 class

1. Constructors
2. base32
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. decode
13. decodeAsHexString
14. decodeAsString
15. encode
16. encodeHexString
17. encodeString