protected function initDefaultExtractors()
{
// initialize the extractor
$pharExtractor = new ExtractorNode('phar', 'AppserverIo\\Appserver\\Core\\Extractors\\PharExtractor', 'AppserverIo\\Appserver\\Core\\Extractors\\PharExtractorFactory');
// add extractor to the appserver node
$this->extractors[$pharExtractor->getPrimaryKey()] = $pharExtractor;
}