anchor.diff:      line.link {
           stroke: #000;
           stroke-width: 1.5px;
  -        fill: green;
  -        stroke-dasharray: 0,2 1;
       }
   
   </style>
  
positive.code:         return nodes;
      }
  
  </script>
  
negative.code: <style>
  
      .node circle {
          cursor: pointer;
  