apply method
Applies this operation to the current list.
Modifies current in place and returns the effective operation
(e.g. populated with captured state like removed index).
Implementation
@override
PolylineOp apply(List<InteractivePolyline> list) {
final idx = list.indexWhere((p) => p.key == oldPolyline.key);
if (idx >= 0) {
list[idx] = newPolyline;
}
return this;
}