docs: function (event) {
                  var domEvent = /** @type aria.DomEvent */
                  new ariaDomEvent(event);
                  var fromTarget = /** @type HTMLElement */
                  domEvent.target;
                  var toTarget = /** @type HTMLElement */
                  domEvent.relatedTarget;
                  for (var i = this.openedPopups.length - 1; i >= 0; i--) {
                      var popup = /** @type aria.popups.Popup */
                      this.openedPopups[i];
                      if (!utilsDom.isAncestor(toTarget, popup.getDomElement())
                              && utilsDom.isAncestor(fromTarget, popup.getDomElement())) {
                          popup.closeOnMouseOut(domEvent);
                      }
                  }
                  domEvent.$dispose();
              }