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

one use

	github.com/gotd/td/tg (current package)
		tl_input_store_payment_purpose_slices_gen.go#L273: func (s InputStorePaymentGiftPremiumArray) Retain(keep func(x InputStorePaymentGiftPremium) bool) InputStorePaymentGiftPremiumArray {