shape property
final
The shape of the card's Material.
Defines the card's Material.shape.
If null, the ambient CardTheme.shape from ThemeData.cardTheme is used. If that is also null, the shape defaults to a RoundedRectangleBorder. The default corner radius is 12.0 when ThemeData.useMaterial3 is true, and 4.0 otherwise. For Material 3 outlined cards, the default shape also includes a border side (see OutlinedBorder.side).
Implementation
final ShapeBorder? shape;