    # File lib/action_controller/caching/actions.rb, line 62
            def expire_action(options = {})
              return unless cache_configured?

              if options[:action].is_a?(Array)
                options[:action].dup.each do |action|
                  expire_fragment(ActionCachePath.path_for(self, options.merge({ :action => action })))
                end
              else
                expire_fragment(ActionCachePath.path_for(self, options))
              end
            end