title: How do I change the store of an Ext.tree.Panel in ExtJS 4.1?
body: <p>I want to change a store of an <code>Ext.tree.Panel</code> when certain criterias are met. But somehow the documentation of ExtJS 4.1 don't shows any method to do this. I read about <code>reconfigure()</code>, but this throws a strange error (<code>Object [object Object] has no method indexOf</code>).</p>
  
  <p>The Object of concern seems to be the <code>me.store</code>, while <code>me</code> is the <code>Ext.tree.Panel</code>.</p>
  
  <p>Since the <code>Ext.tree.Panel</code> is my main view, I can't simply destroy and recreate it. </p>