/**
* Removes route parameters for dynamic step navigation.
* @param array $parameters Current route parameters.
* @param FormFlow $flow The flow involved.
* @return array Route parameters without instance and step parameter.
*/
public function removeRouteParameters(array $parameters, FormFlow $flow)
{
unset($parameters[$flow->getDynamicStepNavigationInstanceParameter()]);
unset($parameters[$flow->getDynamicStepNavigationStepParameter()]);
return $parameters;
}