title: chart.setOptions is not defined
body: <p>I have highcharts 4.0.3 where I need to  modify the tooltipo object dynamically.</p>
  
  <p>When I use chart.setOptions, console says that setOptions is not defined.</p>
  
  <pre><code>chart.setOptions({
              tooltip: {
                  pointFormat: '{series.name} (porcentaje): &lt;b&gt;{point.percentage:.1f} %&lt;/b&gt;&lt;br /&gt;{series.name} (unidades): &lt;b&gt;{point.y}&lt;/b&gt;'
              },
          });
  </code></pre>
  
  <p>How can I do that without updating to highcharts 5.0?</p>