# File lib/fog/hp/models/storage/directory.rb, line 68
        def public_url
          requires :key
          @public_url ||= begin
            begin response = service.head_container(key)
              # escape the key to cover for special char. in container names
              url = "#{service.url}/#{Fog::HP.escape(key)}"
            rescue Fog::Storage::HP::NotFound => err
              nil
            end
          end
        end