public IListObserver <T> Subscribe(HandleItemAdded <T> add, HandleItemRemoved <T> remove)
{
var observer = new ListObserver <T>(add, remove);
Subscribe(observer);
return(observer);
}
public IListObserver <T> Subscribe(Action listChanged)
{
var observer = new ListObserver <T>(added => listChanged(), removed => listChanged());
Subscribe(observer);
return(observer);
}
