How to merge cell of column A while export excel using laravel maatwebsite/excel 3.1?

How to merge cell of column A in excel while data export from database using laravel maatwebsite/excel 3.1. and when cell value of excel column A is same at that time I want merge cell. PHP 7.3 Laravel 5.5 maatwebsite/excel 3.1

via Chebli Mohamed