parent property
      
      ActorNode?
      get
      parent
      
    
    
    
Implementation
ActorNode? get parent => _parent;
      
      set
      parent
      (ActorNode? value) 
      
    
    
    
Implementation
set parent(ActorNode? value) {
  if (_parent == value) {
    return;
  }
  ActorNode? from = _parent;
  _parent = value;
  onParentChanged(from, value);
}