public void Start()
{
lua = Global.Instance().Lua;
lua.LoadDefines(DefinesPath);
// immediate functions
lua.GlobalContext.Globals["addItem"] = (Action <DynValue>)AddItem;
lua.GlobalContext.Globals["deductItem"] = (Action <DynValue>)DeductItem;
lua.GlobalContext.Globals["hasItem"] = (Func <DynValue, DynValue>)HasItem;
}