1. Constructors
  2. UserMessageSendResult
  3. Values
  4. success
  5. timeout
  6. broken
  7. noReceiver
  8. noRelayPath
  9. exceedQPS
  10. e2BSSendFailed
  11. e2BSReturnFailed
  12. notJoin
  13. init
  14. noConnection
  15. exceedMaxLength
  16. emptyUser
  17. notLogin
  18. serverParamsNotSet
  19. unknown
  20. Properties
  21. hashCode
  22. index
  23. runtimeType
  24. Methods
  25. noSuchMethod
  26. toString
  27. Operators
  28. operator ==
  29. Constants
  30. values