    # File lib/action_controller/vendor/rack-1.0/rack/request.rb, line 105
        def GET
          if @env["rack.request.query_string"] == query_string
            @env["rack.request.query_hash"]
          else
            @env["rack.request.query_string"] = query_string
            @env["rack.request.query_hash"]   =
              Utils.parse_nested_query(query_string)
          end
        end