php - createFormBuilder Symfony 的双 foreach

Question

我请你帮我处理这段代码中的双重foreach，我需要那个，注释在哪里，应该有一个阶段步骤列表，我不知道如何在这段代码中执行此操作，提前谢谢你

 $formStage = $this->createFormBuilder($projectStages);
    foreach ($projectStages as $projectStage) {
        $formStage = $formStage
            ->add('title', ChoiceType::class, [
                'choices' => [
                    $projectStage->getTitle() => [
                        $projectStage->getProjectStageSteps()->getValues()[0]->getTitle() => 'v1',
                        //enumeration of stage steps
                    ]
                ]
            ]);
    }

    $formStage->add('save', SubmitType::class, array('label' => 'Update Project Stages'));