title: how to get record from store selecting row in grid?
body: <p>in extjs 3 I use:
  <pre>
      if (Model1.getSelectionModel().getSelections().length == 1 ) {
      record = Model1.store.getAt(Model1.getStore().indexOf(Model1.getSelectionModel().getSelected()))
   }
  </pre>, but in extjs4 it's not work ...</p>