# File lib/fog/rackspace/cdn.rb, line 157
        def purge(file)
          unless file.is_a? Fog::Storage::Rackspace::File
            raise Fog::Errors::NotImplemented.new("#{object.class} does not support CDN purging")  if object
          end

          delete_object file.directory.key, file.key
          true
        end