Intialization

index.php

ErrorExtension::startup();

or as extension

extensions:
	error: WebChemistry\ErrorPresenter\DI\ErrorExtension

Nette configuration

application:
	errorPresenter:
		4xx: Error:Error4xx
		5xx: Error:Error5xx

5xxPresenter

use WebChemistry\ErrorPresenter\Error5xxPresenter as ParentError5xxPresenter;

final class Error5xxPresenter extends ParentError5xxPresenter
{

}