stacks-8.x-1.x-dev/modules/stacks_content_feed/stacks_content_feed.routing.yml

stacks_content_feed.content_feed_ajax:
  path: '/ajax/grid'
  defaults:
    _controller: '\Drupal\stacks_content_feed\Controller\GridController::gridAjax'
    _title: AJAX
  requirements:
    _permission: 'access content'