How to check the existence of move() and run() methods shortly and safely? hasOwnProperty returns false of course for both move and run. dog.prototype is undefined so this isn't a way to start.

class Animal {
  constructor(name) {
    this.name = name;
  }
  speak() {
    console.log(`${this.name} makes a noise.`);
  }
  move() // this method may exist or not
  {
      console.log(`${this.name} moves over.`);
  }
}
class Dog extends Animal {
  constructor(name) {
    super(name); 
  }
  speak() {
    console.log(`${this.name} barks.`);
  }
  run() // this method may exist or not
  {
      console.log(`${this.name} runs fast.`);
  }
}
var dog = new Dog('Caesar');
// in the real-world situation we don't know the type of "dog" here.

How to check if dog.run() exists and invokable? How to check if dog.move() exists and invokable?

Edit: The marked-for-duplicate Q/A (Check whether class constructor defines method) does not answer my question.

The final comment-note in my original post is important: in the real-world situation we don't know the type of "dog" So, I cannot write Animal.prototype or Dog.prototype because I don't know Animal and/or Dog. All I have is

• a reference to an object (dog),
• knowing that dog is created with a new ClassName statement where ClassName is a class defined by the class-syntax.