CrashUtils constructor Null safety

1. baguette
2. CrashUtils
3. CrashUtils
4. CrashUtils constructor

CrashUtils class

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