class AnimalManager {
    instances := []

    __New() {

    }

	init() {
		this.instances.insert(new Dog())
		this.instances.insert(new Cat())
	}

	feedAnimals() {
		for k, _animal in this.instances {
            // if you can, type check for safety in case you want to do many things
			// if (_animal.__Class == "Animal") {
            // if (_animal.feed) {
				_animal.feed()
			// }
		}
	}
}

class Animal {
	feed(howMuch) {
 		throw Exception("I don't know how to eat yet");
	}
}

class Dog extends Animal {
    feed(howMuch) {
        msgbox % "I'm eating " . howMuch . " food."
    }
}

class Cat extends Animal {
    feed(howMuch) {
        msgbox % "I'm eating " . (howMuch/2) . " food because I'm a picky eater."
    }
}

mgr := new AnimalManager ()

mgr.init();
mgr.feedAnimals();