Object.fromLinkable</a> and <a>GraphObject.toLinkable</a>
  properties to true allows users to interactively draw new links between ports.
</p>
<p>
  To draw a new link, mouse down on an "Out" port, move (drag) to nearby an input port,
  and then mouse-up to complete the link.
</p>
<pre class="lang-js" id="linkablePorts"><code>
  diagram.nodeTemplate =
    new go.Node("Auto")
      .add(
        new go.Shape("Rectangle", { fill: "lightgray" }),
        new go.Panel("Table")
          .addColumnDefinition(0,