write_fragment

# File actionpack/lib/action_controller/caching.rb, line 287
      def write_fragment(name, content, options = nil)
        return unless perform_caching

        key = fragment_cache_key(name)
        self.class.benchmark "Cached fragment: #{key}" do
          fragment_cache_store.write(key, content, options)
        end
        content
      end