public boolean collapseLastOpen() {
		if(isAnyItemExpanded()) {
			// if visible animate it out
			if(lastOpen != null) {
				animateView(lastOpen, ExpandCollapseAnimation.COLLAPSE);
			}
			openItems.set(lastOpenPosition, false);
			lastOpenPosition = -1;
			return true;
		}
		return false;
	}
Closes the current open item.
If it is current visible it will be closed with an animation.

@return true if an item was closed, false otherwise
library/src/main/java/com/tjerkw/slideexpandable/library/AbstractSlideExpandableListAdapter.java