def __packed?
      FILES.each do |fn|
        return true if fn.end_with? 'tar.gz' and File.exists?(File.join($path, fn))
      end
      return false
    end
def __packed?
      FILES.each do |fn|
        return true if fn.end_with? 'tar.gz' and File.exists?(File.join($path, fn))
      end
      return false
    end
Check if the local KB is packet or not.

 Returns true if at least one KB tarball file it has been found in the
 local DB path