public static function addSettingsFormFields(QuickForm $form)
 {
     Util::addLDAPResourceFormElement($form, 'resource');
     $form->addElement('text', 'base', array('label' => 'LDAP Search Base'));
     $form->addElement('text', 'objectclass', array('label' => 'Object class'));
     $form->addElement('text', 'filter', array('label' => 'LDAP filter'));
     $form->addElement('textarea', 'query', array('label' => 'Properties', 'rows' => 5));
     return $form;
 }