// A bit on Unity 3D null handling 	ｱｷﾀ━━━(#ﾟДﾟ)━━━!!!!

// cached references to items needing refresh; items implementing IRefreshable all derived from MonoBehaviour
static List<IRefreshable> refreshListeners = new List<IRefreshable>();

//...

	public void OnClick() {
		AnalyzeItemHelper.Analyze(item);		// do some logic
		for(int i=0; i<refreshListeners.Count; i++) {		// ...and notify listeners about change
			if(refreshListeners[i] != null) {		// ensure listeners didn't forget to deregister themselves
				// the problem is we actually reach that line even if SomeListener listener == null
				refreshListeners[i].Refresh();
			} else Debug.LogWarning("One of the refresh listeners is null!");
		}
	}

//---- IRefreshable.Refresh implementation of one of the listeners
	void Refresh {
		if(this == null) return;		// without this line it goes further and further, and finally throws MissingReferenceException in some random place...
		itemsView.Refresh();
		// ...
	}

/*

the problem is caused by the fact UnityEngine.Object overrides equality operators, so if the underlying C object no longer exists (e.g. was destroyed explicitly, or the scene was unloaded) the someUnityObject == null comparison returns true.
But in this code I relied on interfaces, since there was a lot of different things that needed to be notified that given item was analyzed. IRefreshable does not override equality operators, so for the check refreshListeners[i] was not null...

all hail unity ー_ー;

*/