_render_template

# File actionpack/lib/action_controller/metal/streaming.rb, line 172
      def _render_template(options)
        if options.delete(:stream)
          # It shouldn't be necessary to set this.
          headers["cache-control"] ||= "no-cache"

          view_renderer.render_body(view_context, options)
        else
          super
        end
      end