public static void Pay( string product, string action = "purchaseitem", int quantity = 1, int?quantityMin = null, int?quantityMax = null, string requestId = null, string pricepointId = null, string testCurrency = null, FacebookDelegate callback = null) { FacebookImpl.Pay(product, action, quantity, quantityMin, quantityMax, requestId, pricepointId, testCurrency, callback); }