elevation property Null safety
The z-coordinate at which to place this app bar relative to its parent.
This property controls the size of the shadow below the app bar if shadowColor is not null.
The value must be non-negative.
- scrolledUnderElevation, which will be used when the app bar has something scrolled underneath it.
- 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? elevation;