title: How to load data into store using a MemoryProxy
body: <p>I'm trying to load a JSON store using a MemoryProxy (I need to use a proxy because I use different sources depending on the scenario). It kinda looks like this:</p>
  
  <pre><code>var data = Ext.decode(gridArrayData);
  var proxy = new Ext.data.MemoryProxy(data);
  
  var store = new Ext.data.GroupingStore({               
      proxy: proxy
  });
  store.load();
  </code></pre>
  
  <p>However when I inspect this I can see that the proxy has 10 rows of data, but not the store. I'm lost as to why.</p>
  
  <p>Any pointers?</p>