write_fragment_for

# File actionview/lib/action_view/helpers/cache_helper.rb, line 259
      def write_fragment_for(name, options)
        pos = output_buffer.length
        yield
        output_safe = output_buffer.html_safe?
        fragment = output_buffer.slice!(pos..-1)
        if output_safe
          self.output_buffer = output_buffer.class.new(output_buffer)
        end
        controller.write_fragment(name, fragment, options)
      end