title: Custom parsing of fields when loading data into store via proxy in Sencha Touch 2
body: <p>I am trying to figure out the best way/place to parse data that is retrieved by a REST proxy on a ST2 store.  I want to be able to control the mapping of the fields in depth. The data contains fields that do not map to any fields in the model and I do not have control over what data is received in the response. I want to selectively map fields that I want while ignoring the others.</p>
  
  <p>Is the best way to do this with a custom proxy? If so, what method would I overwrite to do this?</p>