title: createDocsListDialog setInitialView error
body: <p>Back again with the createdocsListDialog function :)</p>
  
  <p>I've got it working however, I'd like to limit the files to be selected to be only spreadsheets.  </p>
  
  <p><strong>"Error encountered: Cannot find method setInitialView(string). (line 13)"</strong></p>
  
  <p>The .setInitialView appears in the script editor as a method, but when running.. not so much.  Here's the code.</p>
  
  <p><code>var doclisthandler = app.createServerHandler('selectionhandler');
  var doclist = app.createDocsListDialog().showDocsPicker() .addSelectionHandler(doclisthandler).setInitialView('spreadsheet');</code></p>
  
  <p>Any ideas?  </p>