public RuleVerifierManager() {
PrettyFormLayout form = new PrettyFormLayout();
form.addHeader( images.ruleVerification(),
new HTML( constants.EditRulesVerificationConfiguration() ) );
form.startSection( constants.AutomaticVerification() );
final CheckBox enableOnlineValidator = new CheckBox();
enableOnlineValidator.setValue( WorkingSetManager.getInstance().isAutoVerifierEnabled() );
form.addAttribute( constants.Enabled(),
enableOnlineValidator );