How to create a modal bottomsheet with circular corners in Flutter?

Question

showModalBottomSheet does not provide any styling or decorations. I want to create something like the Google Tasks bottomsheet.

Answer 1

showModalBottomSheet(
shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(
          top: Radius.circular(20),
        ),
      ),
      clipBehavior: Clip.antiAliasWithSaveLayer,
)