trackGap property
final
The gap between the indicator and the track.
If year2023 is false or ThemeData.useMaterial3 is false, then no track gap will be drawn.
Set trackGap to 0 to hide the track gap.
If null, then the ProgressIndicatorThemeData.trackGap will be used. If that is null, then defaults to 4.
Implementation
final double? trackGap;