Is there an Artboard property that says if the Artboard is an overlay?

Is there a property that says if the artboard is an overlay? I can probably check the incoming interactions and see that way.

https://adobexdplatform.com/plugin-docs/reference/interactions.html#interactions

In what case would an artboard be used as an overlay?

When you run Desktop Preview I’m seeing use cases where an artboard is used as a pop up.

In the Responsive Design UIKit the last artboard is an overlay.

I think I’ve sort of got it working with this:

/**
 * Returns true if the artboard is an overlay to another artboard
 * @param {Artboard} item 
 * @return {Boolean}
 **/
function isArtboardOverlay(item) {
	var interactions = null;

	try {
		interactions = item.incomingInteractions;

		for (let index = 0; index < interactions.length; index++) {
			var interaction = interactions[index];
			var localInteractions = interaction.interactions;

			for (let j = 0; j < localInteractions.length; j++) {
				const localInteraction = localInteractions[j];
				var trigger = localInteraction.trigger;
				var action =  localInteraction.action;
				
				if (trigger && trigger.type==TriggerType.TAP && action && action.type==ActionType.OVERLAY) {
					return true;
				}
			}

		}
	
		return false;
	}
	catch(error) {

		log(error.stack);
		// when an interaction(s) is added to an node and one does not have an endpoint the following errors happen
		// Plugin TypeError: Cannot read property 'pluginWrapper' of null
    	// at Interaction.serializeForApi (lib/interactions/Interaction.js:1:11398)
    	// at forEach.e (plugins/ScenegraphWrappers.js:1:11918)
    	// at Array.forEach (<anonymous>)
		 // at Text.get (plugins/ScenegraphWrappers.js:1:11896)
	
		return false;
	}
}