code: public function getSource($sourceName, array $params = array())
      {
          if (false === isset($params['connection_name'])) {
              throw new \InvalidArgumentException("Configuration array must contain a 'connection_name' key");
          }
          $connectionConfig = $this->connectionManager->getConnectionConfig($params['connection_name']);
          $toReturn = new Memcached($sourceName, $params, isset($connectionConfig['options']['prefix']) ? $connectionConfig['options']['prefix'] : '');
          $toReturn->setConnectionManager($this->connectionManager);
          $toReturn->setDataParser($this->dataParser);
  
          return $toReturn;
      }
docs: Build source
  @param string $sourceName
  @param array  $params
  @return \Yucca\Component\Source\Memcache