1. m4e_sdk
2. m4e_sdk
3. ExceptionCode
4. toString method

ExceptionCode class

1. Properties
2. hashCode
3. runtimeType
4. Methods
5. toString
6. noSuchMethod
7. Operators
8. operator ==
9. Static methods
10. parse
11. Constants
12. kConnectionTimeoutExceptionCode
13. kFailedTransactionExceptionCode
14. kNoAuthUserExceptionCode
15. kNoCacheDataExceptionCode
16. kNoInternetConnectionExceptionCode
17. kUndefinedExceptionCode

@override
String toString() => _exceptionCode;