def check_static_not_found(links)
      static_links = links.map { |l| StaticLink.new(l, @site) }
      static_links.each do |static_link|
        next unless static_link.check?
        unless File.exist?(static_link.file_path)
          not_found_error(static_link.file_path)
          next
        end
        next unless static_link.css?
        check_static_not_found static_link.extract_urls_from_fake_css_response
      end
    end
def check_static_not_found(links)
      static_links = links.map { |l| StaticLink.new(l, @site) }
      static_links.each do |static_link|
        next unless static_link.check?
        unless File.exist?(static_link.file_path)
          not_found_error(static_link.file_path)
          next
        end
        next unless static_link.css?
        check_static_not_found static_link.extract_urls_from_fake_css_response
      end
    end
check files linked on static document
 see lib/validate_website/runner.rb