->add('customer_type', ChoiceType::class, [
                'required' => true,
                'expanded' => true,
                'multiple' => false,
                'choices'  => [
                    '一般会員'   => 'normal',
                    'プレミアム会員' => 'premium',
                ],
                'eccube_form_options' =>
                [
                    'auto_render' => true,
                    'form_theme' => null,
                    'style_class' => 'ec-radio',
                ]
            ])