AnimarkerController constructor
      
      AnimarkerController({ 
    
    
- required AnimarkerControllerDescription description,
Implementation
AnimarkerController({
  required this.description
})  : tracker = <MarkerId, IAnilocationTask>{} {
  _isActiveTrip = description.isActiveTrip;
  _useRotation = description.useRotation;
  _radius = description.rippleRadius;
}