/// <summary>
/// Visitor joins the queue to checkin
/// </summary>
/// <param name="human"></param>
public void Enqeue(Human human)
{
EntranceQueue.Enqueue(human);
}
/// <summary>
/// Get first visitor out of the list to check him in
/// </summary>
/// <returns></returns>
public Human Dequeue()
{
return(EntranceQueue.Dequeue());
}