render_with_layout

# File actionview/lib/action_view/renderer/template_renderer.rb, line 71
      def render_with_layout(view, template, path, locals)
        layout  = path && find_layout(path, locals.keys, [formats.first])

        body = if layout
          ActiveSupport::Notifications.instrument("render_layout.action_view", identifier: layout.identifier) do
            view.view_flow.set(:layout, yield(layout))
            layout.render(view, locals) { |*name| view._layout_for(*name) }
          end
        else
          yield
        end
        build_rendered_template(body, template)
      end