Holds information about the current request. @todo: Remove once the upstream RequestContext provides fromRequestStack():

public RequestContext::getCompleteBaseUrl()

public RequestContext::setCompleteBaseUrl($complete_base_url)

The scheme, host and base path, for example "http://example.com/d8"

public RequestContext::fromRequest(Request $request)

public RequestContext::fromRequestStack(RequestStack $request_stack)