titleTextStyle property
final
The default text style for the AppBar's title widget.
If this property is null, then AppBarTheme.titleTextStyle of ThemeData.appBarTheme is used. If that is also null, the default value is a copy of the overall theme's TextTheme.titleLarge TextStyle, with color set to the app bar's foregroundColor.
This property is used to configure an AppBar.
Implementation
final TextStyle? titleTextStyle;