How do I add a custom tooltip to angular-nvd3 multibar chart?
<p>I cannot get this to work in a multibar chart</p>

<pre><code>$scope.countsChart.options = {
  deepWatchData: false,
  chart: {
    type: 'multiBarChart',
    margin: {
      top: 20,
      right: 20,
      bottom: 45,
      left: 45
    },
    clipEdge: true,
    duration: 500,
    stacked: true,
    showControls: false,
    xAxis: {
      showMaxMin: false,
      tickFormat: d =&gt; $scope.countsChart.selectedGranularity().tickFormat(d)
    },
    yAxis: {
      axisLabelDistance: -20,
      tickFormat: d =&gt; parseInt(d).toLocaleString()
    },
    useInteractiveGuideline: false,
    interactive: true,
    tooltips: true,
    tooltipContent: (key, x, y, e, graph) =&gt; '&lt;h1&gt;Test&lt;/h1&gt;'
  }
};
</code></pre>

<p>Instead of my custom tooltip, the default tooltip still shows.</p>

<p><img src="https://cloud.githubusercontent.com/assets/1117701/12497012/17b96cb8-c04e-11e5-983e-2b841c2fdd95.png" alt="image"></p>

<p>Anybody have success making a custom tooltip?</p>