updateData (trafficData) {
    if (trafficData && trafficData.nodes) {
      this.trafficData = trafficData;
      this.rootGraphName = trafficData.name;

      // Now that the initial data is loaded, check if we can set the initial node
      if (this.initialView) {
        this.setView(this.initialView, this.initialObjectToHighlight);
      }

      this.updateGraph(this.currentGraph);
    }
  }
Set the new set of traffic data to render. This is expected to be called
with the complete set of traffic data anytime there is an update.

@param {object} data The traffic data that matches the format in (https://github.com/Netflix/Vizceral/wiki/How-to-Use#graph-data-format)