function releaseAllPointerEvents(region) {
	if (eventHandlers.has(region)) {
		for (let i = 0; i < pointerEventList.length; i++) {
			releasePointerEvent(pointerEventList[i], region);
		}
	}
}
allows the removal of all registered event listeners from the object target.
@memberof input
@param {Rect|Polygon|Line|Ellipse} region - the registered region to release event from
@example
// release all registered event on the
me.input.releaseAllPointerEvents(this);