android – Flutter Grid View parts’s cornerRadius not working

that is my subject:

I’ve a GridView.depend with a Listing.generate as youngsters.
Mainly I’ve a grid of maps made with google_maps_flutter and I need to give every of them a nook radius however it applies solely to the final aspect of my listing , I’ve tried placing nook radius in every single place:

1. inside a field ornament wrapping my parts inside a container, varied tries by no means labored.
2. wrapping in a clipRRect, nonetheless applies just for the final aspect.
3. giving to my customized widget Map a nook radius, nonetheless applies just for the final aspect.

I believe it’s a render drawback, after I run my app on a bodily machine and never the simulator, it really works properly for each cell in android, however in iOS there may be nonetheless the issue. please assist.
drawback

begin of the listing

I need all of the cells to have a border radius