mxDragSource.prototype.removeDragElement=function(){null!=this.dragElement&&(null!=this.dragElement.parentNode&&this.dragElement.parentNode.removeChild(this.dragElement),this.dragElement=null)};mxDragSource.prototype.getElementForEvent=function(a){return mxEvent.isTouchEvent(a)||mxEvent.isPenEvent(a)?document.elementFromPoint(mxEvent.getClientX(a),mxEvent.getClientY(a)):mxEvent.getSource(a)};