# File lib/FileCache.rb, line 76
  def get_file_system_image(url)
    file=get_url(url)    
    image=RipXplore.best_fit_from_file(file)
    @@file_system_image_urls<<url if (!@@file_system_image_urls.nil? && !@@file_system_image_urls.include?(url))    
    return image
  end