showDropOverlay: function() {
var dropTarget = this.getDropOverlayTarget(),
overlay = this.getDropOverlay();
overlay.css('display', 'block');
overlay.css('z-index', 1 + highestZIndex(overlay.siblings()));
overlay.height(dropTarget.outerHeight());
overlay.width(dropTarget.outerWidth());
overlay.position({
my: 'top left',
at: 'top left',
of: dropTarget
});
},
_updateZIndex: function () {
var zIndex = 1 + highestZIndex();
this.$().css('z-index', zIndex);
},