1. Dart
2. dart:io
3. SocketDirection
4. both constant

SocketDirection class

1. Properties
2. hashCode
3. runtimeType
4. Methods
5. noSuchMethod
6. toString
7. Operators
8. operator ==
9. Constants
10. BOTH
11. both
12. RECEIVE
13. receive
14. SEND
15. send

static const SocketDirection both = const SocketDirection._(2)