persistentFooterButtons property Null safety
final
A set of buttons that are displayed at the bottom of the scaffold.
Typically this is a list of TextButton widgets. These buttons are persistently visible, even if the body of the scaffold scrolls.
These widgets will be wrapped in an OverflowBar.
The persistentFooterButtons are rendered above the bottomNavigationBar but below the body.
Implementation
final List<Widget>? persistentFooterButtons;