Information from:
 https://doc.nette.org/en/2.3/presenters

Flow with presenters:

startup()            \
                     |-- execution
action<Action>()     /

                     \
handle<Signal>()     |-- interaction
                     /

beforeRender()       \
                     |
render<View>()       |-- rendering
                     /
shutdown


In action<Action>() can change other render method:
  This->setView("otherview")

Termination presenters:
  - $presenter->terminate()
  - $presenter->sendTemplate()
  - $presenter->sendPayload() (e.g. AJAX)
  - $presenter->sendResponse($response)
  - throw new Nette\Application\BadRequestException (XXX) -> send code XXX (dfl 404)

Redirect:
  redirect: external redirection
  forward: internal call to new action

  - $this->redirect("Presenter:Action", $id);
  - $this->redirect(301, "Presenter:Action", $id);
  - $this->redirectUrl("https://...")

Persistant values:

class PPresenter extends BasePresenter {

	/** @persistent */
	public $lang;
}

$lang wordt automatisch meegegeven met parameters