layoutBehavior property Null safety
final
Defines whether a ButtonBar should size itself with a minimum size constraint or with padding.
Overrides the surrounding ButtonThemeData.layoutBehavior.
If null then it will use the surrounding ButtonBarThemeData.layoutBehavior. If that is null, it will default ButtonBarLayoutBehavior.padded.
Implementation
final ButtonBarLayoutBehavior? layoutBehavior;