scrolledUnderElevation property
final
The elevation that will be used if this app bar has something scrolled underneath it.
If non-null then it AppBarTheme.scrolledUnderElevation of ThemeData.appBarTheme will be used. If that is also null then elevation will be used.
The value must be non-negative.
This property is used to configure an AppBar.
Implementation
final double? scrolledUnderElevation;