How to pass an object of any class to a method?

Question

Unity

I have a method in each prefab with its own class that passes a click on it to the main class

public class Test1 : MonoBehaviour, IPointerClickHandler{
  public void OnPointerClick(PointerEventData pointerEventData){ GameController.instance.CellClick(this); }

.....
public class Test2 : MonoBehaviour, IPointerClickHandler{
  public void OnPointerClick(PointerEventData pointerEventData){ GameController.instance.CellClick(this); }

......
public class GameController : MonoBehaviour{
  public void CellClick(......){

How can I understand which object is being addressed and how can I manipulate it later?

Answer 1

Well vrodeby all same prefabs are inherited from GameObject'a?
Can it be like this

public void CellClick(GameObject o){
   if(o.GetType() == typeof(Car)){
      Car car = (Car)o ;
   //todo
  }
   if(o.GetType() == typeof(Animal)){
      Animal animal= (Animal)o ;
    //todo
  }
}

If the manipulations are of the same type, then you can fasten the interfaces

Answer 2

Why do you need to understand this? Make a common interface, for example, and that's it.