build_view_context_class

# File actionview/lib/action_view/rendering.rb, line 59
      def build_view_context_class(klass, supports_path, routes, helpers)
        if inherit_view_context_class?
          return superclass.view_context_class
        end

        Class.new(klass) do
          if routes
            include routes.url_helpers(supports_path)
            include routes.mounted_helpers
          end

          if helpers
            include helpers
          end
        end
      end