NotEmptyValidator constructor Null safety

1. baguette
2. NotEmptyValidator
3. NotEmptyValidator
4. NotEmptyValidator constructor

NotEmptyValidator class

1. Constructors
2. NotEmptyValidator
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. validate
10. Operators
11. operator ==