StepHighlightCallback typedef
StepHighlightCallback =
void Function(UiNode target, MissionStep step, String missionId)
Richer highlight hook: also receives the step (for duration_ms) and the
mission id (an internal hl_ mission draws through the standalone path).
When set it replaces HighlightCallback for drawing.
Implementation
typedef StepHighlightCallback = void Function(
UiNode target,
MissionStep step,
String missionId,
);