Devise\Models\Scaffolding\ScaffoldingManager::interpretFieldsArray PHP Method

    private function interpretFieldsArray(&$input)
    {
        foreach ($input['fields'] as $fIndex => $field) {
            if (isset($field['choices'])) {
                foreach ($field['choices'] as $cIndex => $choice) {
                    $input['fields'][$fIndex]['choices'][$choice['value']] = $choice['key'];
                    unset($input['fields'][$fIndex]['choices'][$cIndex]);
                }
            }
            if (array_get($field, 'formType') == '') {
                unset($input['fields'][$fIndex]['formType']);
            }
            if (array_get($field, 'default') == '') {
                unset($input['fields'][$fIndex]['default']);
            }
            if (array_get($field, 'label') == '') {
                unset($input['fields'][$fIndex]['label']);
            }
        }
    }