1. Properties
2. badInput
3. customError
4. hashCode
5. patternMismatch
6. rangeOverflow
7. rangeUnderflow
8. runtimeType
9. stepMismatch
10. tooLong
11. tooShort
12. typeMismatch
13. valid
14. valueMissing
15. Methods
16. noSuchMethod
17. toString
18. Operators
19. operator ==