/// <summary>
/// Creates a new <see cref="NpcData"/> instance.
/// </summary>
/// <param name="id">Npc id</param>
/// <param name="name">Npc Name</param>
/// <param name="shop">Npc Shop</param>
public NpcData(string id, string name, ShopData shop)
: this(id, name, shop, null)
{
}