github.com/gotd/td/tg.InputStorePaymentPremiumGiveaway.GetCountriesISO2 (method, view implemented interface methods)

one use

	github.com/gotd/td/tg (current package)
		tl_input_store_payment_purpose_gen.go#L1231: func (i *InputStorePaymentPremiumGiveaway) GetCountriesISO2() (value []string, ok bool) {