code: public function isSupported(FileSource $source)
  	{
  		$base = $source->getFileInfo()->getBasename();
  		
  		foreach($this->extensions as $ext)
  		{
  			if(preg_match("'\\." . preg_quote($ext, "'") . "$'i", $base))
  			{
  				return true;
  			}
  		}
  		
  		return false;
  	}
docs: {@inheritdoc}