public function deleteFixture($fixture)
 {
     $model = $fixture->getWrappedModel();
     if ($model->getResource()->isUsedBySuperProducts($model)) {
         return false;
     } else {
         return parent::deleteFixture($fixture);
     }
 }
 /**
  * @param array $properties
  * @return Mage_Admin_Model_User
  * @throws Exception
  */
 public function create($properties = array())
 {
     $model = parent::create($properties);
     $role = \Mage::getModel("admin/role");
     $role->setParentId(1);
     $role->setTreeLevel(1);
     $role->setRoleType('U');
     $role->setUserId($model->getId());
     $role->save();
     return $model;
 }