code: public void executeOnError(final ActionEvent event,
  			final List<Diagnostic> diags) {
  		errorsBox.setErrors(diags);
  		errorsBox.setFocussed();
  	}
docs: <p>
  This method is called if errors are found from validation.</p>
  
  <p>
  This method can be overriden, but don't forget to call super.executeOnError if you still want to see error
  messages.</p>
  
  @param event the action event which triggered this action.
  @param diags the list into which any validation diagnostics were added.