title: switching back and forth between controllers in extjs 4
body: <p>I am building an application in extjs 4 (MVC). I often find the need to switch back and forth between two controllers. But i cant seem to find how in the documentation.</p>
  
  <p>My scenario is like this.</p>
  
  <pre><code>Ext.define('mycontroller',{
   someMethod: function() {
   }
  })
  
  Ext.define('mycontroller1',{
   someMethod: function() {
     var someAction = function() {
       //need to call somethod in mycontroller
     }
   }
  })
  </code></pre>
  
  <p>Any ideas?</p>