OptionaloutlineColour of the outline painted beneath the focused stripe.
OptionalwidthMultiplier applied to the line width of focused features, clamped to
INCIDENT_FOCUS_WIDTH_FACTOR_RANGE (1–1.8); a value that is not a finite number
falls back to the default. 1 disables the width pop while keeping the outline.
Visual treatment applied to the focused subset by TrafficIncidentOverlayModule.setFocus.