如何下载excel模板在Laravel Excel3.1中只显示标题？

composer require maatwebsite/excel

php artisan make:controller ExcelController

use Maatwebsite\Excel\Facades\Excel;

public function downloadTemplate()
{
    return Excel::download(new TemplateExport, 'template.xlsx', \Maatwebsite\Excel\Excel::XLSX, [
        'only_headers' => true
    ]);
}

php artisan make:export TemplateExport

use Maatwebsite\Excel\Concerns\WithHeadings;

class TemplateExport implements WithHeadings
{
    public function headings(): array
    {
        return [
            'Column 1',
            'Column 2',
            'Column 3',
            // 添加更多的列标题
        ];
    }
}

Route::get('/download-template', 'ExcelController@downloadTemplate');