Unity events within non monobehaviour class?

Unity Engine
1

Can someone give me an example of of how to access an monobehaviour event from a within a class that doesn’t derive from monobehaviour?

So for example how can I do the following

class someClassName : NonMonoClass{
	public void MonoBehaviour.Start(){
		Debug.Log("START");
	}
}
2

You can’t. Why are you trying to?