URL query attribute to indicate the wrapper used to render a request. The wrapper format determines how the HTML is wrapped, for example in

public MainContentViewSubscriber::__

static MainContentViewSubscriber::ge

public MainContentViewSubscriber::on

The class resolver service. Type:

The available main content renderer services, keyed per format. Type:

View subscriber rendering main content render arrays into responses. Additional target rendering formats can be defined by adding another service

The current route match. Type: