title: Grid Grouping How to set checked "Show in groups" , manually
body: <p>I am using ExtJs 4.1</p>
  
  <p>I have Grid with Grouping enabled. So there I can see the "Show in Group" menu on Grids header.</p>
  
  <p>Now , my query is , If I have removed Grouping , i.e. unchecked the checkbox for "Show in Group". So Grouping gets removed. Right ?
  Now If I have set the Grouping i.e. How I can set the check box to checked? manually i.e. through coding. Now by clicking on the check box.</p>
  
  <p>Here by default we get Show in Gorups "<strong>Checked</strong>"
  <img src="https://i.stack.imgur.com/YnoOF.png" alt="enter image description here"></p>
  
  <p>Now I have removed the <strong>checked</strong>
  <img src="https://i.stack.imgur.com/4k7H5.png" alt="enter image description here"></p>
  
  <p>Now I want to checked this CheckBox , and show the Grouping using javascript coding</p>
  
  <p>Please suggest How this is possible?</p>