ram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray);
</code></pre>
<script>goCode("defaultPort", 600, 150)</script>
<p>
  This appearance does not look or behave quite right.
  Really we want links to connect to the circular <a>Shape</a>.
</p>

<p>
  If you want a particular element to act as the port rather than the whole node,
  just set its <a>GraphObject.portId</a> to the empty string.
  The empty string is the name of the default port.
</p>
<p>
  In this example, we set <a>GraphObject.port