This is how most object-oriented languages work, people just don't realize it. Here's some Java code:

    class Base {
        private int field;
        
        Base() {
            this.field = 1;
        }
        
        void baseMethod() {
            System.out.println("Base.field = " + field);
        }
    }
    
    class Derived extends Base {
        private int field;
        
        Derived() {
            this.field = 2;
        }
        
        void derivedMethod() {
            System.out.println("Derived.field = " + field);
        }
    }
    
    public static void main(String[ ] args) {
        Derived d = new Derived();
        d.baseMethod();
        d.derivedMethod();
    }

It prints:

    Base.field = 1
    Derived.field = 2