github.com/gotd/td/tg.InputStorePaymentPremiumGiftCodeArray.Retain (method)

one use

	github.com/gotd/td/tg (current package)
		tl_input_store_payment_purpose_slices_gen.go#L355: func (s InputStorePaymentPremiumGiftCodeArray) Retain(keep func(x InputStorePaymentPremiumGiftCode) bool) InputStorePaymentPremiumGiftCodeArray {