mxRectangle.prototype.height=null;mxRectangle.prototype.setRect=function(a,b,c,d){this.x=a;this.y=b;this.width=c;this.height=d};mxRectangle.prototype.getCenterX=function(){return this.x+this.width/2};mxRectangle.prototype.getCenterY=function(){return this.y+this.height/2};