LDFailureType constructor Null safety

1. launchdarkly_flutter_client_sdk
2. launchdarkly_flutter_client_sdk
3. LDFailureType
4. LDFailureType const constructor

LDFailureType enum

1. Constructors
2. LDFailureType
3. Values
4. INVALID_RESPONSE_BODY
5. NETWORK_FAILURE
6. UNEXPECTED_STREAM_ELEMENT_TYPE
7. UNEXPECTED_RESPONSE_CODE
8. UNKNOWN_ERROR
9. Properties
10. hashCode
11. index
12. runtimeType
13. Methods
14. noSuchMethod
15. toString
16. Operators
17. operator ==
18. Constants
19. values