code: public void setSelectedCorpusInBackground(final Set<String> selectedCorpora) {
  		loadingIndicator.setVisible(true);
  		table.setVisible(false);
  		Background.run(new ExampleFetcher(selectedCorpora, UI.getCurrent()));
  	}
docs: Sets the selected corpora and causes a reload
  
  @param selectedCorpora Specifies the corpora example queries are fetched for.
  If it is null, all available example queries are
  fetched.