Fake routes without _controller

[marapper]

Sometimes we need "fake" routes for external links (from one site to another) like

site_smth:
  pattern:  /smth/{id}/
  requirements:
    id: \d+

It helps make external urls tied and consistent for using in twig.

While route have no _controller (but pattern) we have no his route in suggest list (and throw "Missing Route" in usage).

{{ 'http://example.com' ~  path('site_smth')}}