/**
* Factory method for getting an instance of this class as a singleton
*
* @return Tx_Yag_Domain_Import_DirectoryImporter_ImporterBuilder Singleton instance of directory importer builder
*/
public static function getInstance()
{
if (self::$instance === null) {
self::$instance = new self(Tx_Yag_Domain_Configuration_ConfigurationBuilderFactory::getInstance());
}
return self::$instance;
}
