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

one use

	github.com/gotd/td/tg (current package)
		tl_help_promo_data_slices_gen.go#L220: func (s HelpPromoDataEmptyArray) Retain(keep func(x HelpPromoDataEmpty) bool) HelpPromoDataEmptyArray {