In Dart, as discussed when we covered packages, the privacy is at the library level, but it is still possible to have private fields in a class even though Dart does not have the keywords public, protected, and private. A simple return of a private field's value can be performed with a one-line function:

String getFirstName() => _name;

To retrieve this value, a function call is required, for example, Person.getFirstName(); however, it may be preferable to have a property syntax such as Person.firstName. Having private fields and retaining the property syntax in this manner is possible using the get and set keywords.

int get score  => score + bonus; 
set score(int increase)  => score += increase * level;