public function getFilterboxConfigurationCollectionMock()
 {
     $filterBoxConfigurationCollection = new Tx_PtExtlist_Domain_Configuration_Filters_FilterboxConfigCollection();
     $filterBoxConfigurationCollection->addItem($this->getFilterboxConfigurationMock('filterbox1'));
     $filterBoxConfigurationCollection->addItem($this->getFilterboxConfigurationMock('filterbox2'));
     return $filterBoxConfigurationCollection;
 }