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

    protected function findStepByIndex($index)
    {
        /** @var array $steps */
        $steps = $this->steps();
        if ($index < 0 || $index >= count($steps)) {
            throw new StepNotFoundException();
        }
        /** @var WizardStep $step */
        $i = 0;
        foreach ($steps as $id => $step) {
            if ($i == $index) {
                return $step;
            }
            ++$i;
        }
        throw new StepNotFoundException();
    }