tmgmt-8.x-1.x-dev/tmgmt_test/tmgmt_test.routing.yml

tmgmt_test.add_to_cart:
  path: '/tmgmt-add-to-cart/{tmgmt_job_item}'
  defaults:
    _controller: 'Drupal\tmgmt_test\TestController::addToCart'
  requirements:
    _access: 'TRUE'