removeRoute method Null safety

void removeRoute(
  1. int pointer,
  2. PointerRoute route
)

Removes a route from the routing table.

No longer call route when routing a PointerEvent corresponding to pointer. Requires that this route was previously added to the router.

Routes removed reentrantly within PointerRouter.route will take effect immediately.

Implementation

void removeRoute(int pointer, PointerRoute route) {
  assert(_routeMap.containsKey(pointer));
  final Map<PointerRoute, Matrix4?> routes = _routeMap[pointer]!;
  assert(routes.containsKey(route));
  routes.remove(route);
  if (routes.isEmpty) {
    _routeMap.remove(pointer);
  }
}