Embed a view in Drupal 8 code

Sometimes its useful to embed a view in some code in Drupal 8.  Its also useful to pass arguments.  

Within the view you need to setup a contextual filter whicyh alolwos you to pass in arguments.  most likely you will want the allow multiple option on.

Then this code can be used to embed the view.

$show_nids = [123,456,444];

$showsView = views_embed_view('shows', 'block_1', implode($show_nids, '+'));