private function getPersistence()
    {
        if ($this->persistence === null) {
            $this->persistence = common_persistence_KeyValuePersistence::getPersistence(
                $this->getOption(self::OPTION_PERSISTENCE)
            );
        }
        return $this->persistence;
    }
private function getPersistence()
    {
        if ($this->persistence === null) {
            $this->persistence = common_persistence_KeyValuePersistence::getPersistence(
                $this->getOption(self::OPTION_PERSISTENCE)
            );
        }
        return $this->persistence;
    }
private function getPersistence ( ) { if ( $ this -> persistence === null ) { $ this -> persistence = common_persistence_KeyValuePersistence :: getPersistence ( $ this -> getOption ( self :: OPTION_PERSISTENCE ) ) ; } return $ this -> persistence ; }
Get the persistence
Get the persistence