What's the logic behind the check at line 282? It seems you can, in fact, only set :views inside a namespace.

I'd like to set the layout for an entire namespace, in this case a CMS-like backend. And I'd like to do so without having to pass the same :layout argument to the erb method every time.

EDIT: Apparently set :layout is not a thing at all. Perhaps it should?
EDIT EDIT: Seems to be set :erb, :layout => :something instead, to set the default layout. But that has sinatra-namespace complaining about set :erb, which brings me back to the question above.