yeah sure so we have integrated a PayPal library why I'm specifying PayPal is because we faced a lot of issues while we were doing composer install the library had been depreciated by the original person who was maintaining it so we had to fix and because of PHP's version upgrade we had to make a fix for it so and also we have to had to man for the library and manage it ourselves so so in that way because of composer we were able to easily manage that using by forking the library on it

