class method self.new

# File actionpack/lib/action_dispatch/http/cache.rb, line 44
        def initialize(*)
          status, header, body = super

          @cache_control = {}
          @etag = self["ETag"]

          if cache_control = self["Cache-Control"]
            cache_control.split(/,\s*/).each do |segment|
              first, last = segment.split("=")
              last ||= true
              @cache_control[first.to_sym] = last
            end
          end
        end