Embed URL within a circle

Hi,
Does anyone know how to embed a url within a circle in codeflower so that when I do a mouse over and the url is visible I can click on it.

Is it something that I can embed in the following:

.call(this.force.drag)
.on("click", this.click.bind(this))
.on("mouseover", this.mouseover.bind(this))
.on("mouseout", this.mouseout.bind(this));

Thanks in advance.

Start by tracing the circle event handlers shown in the issue: force.drag, click, mouseover, and mouseout. Check how CodeFlower currently exposes URLs and determine the expected interaction; done means a URL associated with a circle is visible on hover and can be clicked.

Written by the indexing model from the issue text.