RestExceptions constructor Null safety

1. irte_engine
2. rest_exceptions
3. RestExceptions
4. RestExceptions constructor

RestExceptions class

1. Constructors
2. RestExceptions
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. getException