Sonata\CustomerBundle\Admin\CustomerAdmin::configureFormFields PHP Method

    public function configureFormFields(FormMapper $formMapper)
    {
        $now = new \DateTime();
        $formMapper->with('customer.group.general', array('class' => 'col-md-7'))->add('user', 'sonata_type_model_list')->add('firstname')->add('lastname')->add('locale', 'locale')->add('birthDate', 'sonata_type_date_picker', array('years' => range(1900, $now->format('Y')), 'dp_min_date' => '1-1-1900', 'dp_max_date' => $now->format('c')))->add('birthPlace')->end()->with('customer.group.contact', array('class' => 'col-md-5'))->add('email')->add('phoneNumber')->add('mobileNumber')->add('faxNumber')->add('isFake')->end();
    }