How to check the presence of an object on the stage and, in its absence, not execute an event (or just a line of code)?

Question

Unity

public void Start()
 {
        GameEvents.current.onLaserTriggerEnter += Lose;
 }

Here is the line, although I think it doesn't matter what the code is... I
guess that you can find the "laser" object using FindObjectWithTag and reset the line using return, but here's how to do it all without a clue ..

Answer 1

If the object is not found - then FindObjectWithTag will return null - check for it