scrolledUnderElevation property Null safety
The elevation that will be used if this app bar has something scrolled underneath it.
The value must be non-negative.
- elevation, which will be used if there is no content scrolled under the app bar.
- shadowColor, which is the color of the shadow below the app bar.
- surfaceTintColor, which determines the elevation overlay that will be applied to the background of the app bar.
- shape, which defines the shape of the app bar's Material and its shadow.
final double? scrolledUnderElevation;