title: extjs : how can I hide series name from legend?
body: <p>I want to hide a series name from legend, how can I do it ?</p>
  
  <pre><code>Ext.each(chart.series.items, function(series) {
              if (series.yField = 'done') {
                  alert('found done');
                  // hides the series
                  series.hideAll();
  
                  series.showInLegend = false; // STILL SHOWS
                  return false;
              }
          });
  </code></pre>
  
  <p>Any help is appreciated.</p>