public Wall()
{
observable = new ObservableObject(this);
HealthPoints = 20;
ResizeTo(1, 1);
observable.SubscribeForLifetime(nameof(HealthPoints), this.SizeOrPositionChanged.Fire, this.Lifetime);
}
public void SubscribeForLifetime(string propertyName, Action handler, ILifetimeManager lifetimeManager) => observable.SubscribeForLifetime(propertyName, handler, lifetimeManager);