IsoactionInternalError constructor Null safety

1. sendbird_sdk
2. isolate_bridge_def
3. IsoactionInternalError
4. IsoactionInternalError constructor

IsoactionInternalError class

1. Constructors
2. IsoactionInternalError
3. Properties
4. action
5. exec
6. hashCode
7. runtimeType
8. stamp
9. Methods
10. noSuchMethod
11. toString
12. Operators
13. operator ==