mxVertexHandler.prototype.mouseDown=function(a,b){!b.isConsumed()&&this.graph.isEnabled()&&(a=this.getHandleForEvent(b),null!=a&&(this.start(b.getGraphX(),b.getGraphY(),a),b.consume()))};mxVertexHandler.prototype.isLivePreviewBorder=function(){return null!=this.state.shape&&null==this.state.shape.fill&&null==this.state.shape.stroke};