MarvinLabs\SetupWizard\Wizard\DefaultSetupWizard::stepIndex PHP Метод

    public function stepIndex($stepId)
    {
        $steps = $this->steps();
        $i = 0;
        foreach ($steps as $id => $step) {
            if ($id == $stepId) {
                return $i;
            }
            ++$i;
        }
        throw new StepNotFoundException();
    }