Encapsulation, Inheritance, & Abstract Class.dart

// Implementasi Abstract Class
// Abstract_Class_Pointer = Name of abstract_Class
abstract class Bicara{
   void say();
}
class HelloWorld Extends Bicara {
   @override
   void say() {
    print('something');
   }
}
method say(); di class Bicara(); Akan tertimpa 
dengan method say(); di class HelloWorld.