text: define(function(){
    function Template(canvas){
      this.canvas = canvas;
    };
  
    Template.prototype ={
      getVertexShape: function(){
        return this.canvas.display.ellipse({
              radius: 15,
              fill: "#079"
            });
      },
      getEdgeShape: function(){
         return this.canvas.display.line({
          stroke: "3px #079",
          cap: "round"
        });
      }
    };
  
    return Template;
  });
  