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

one use

	github.com/gotd/td/tg (current package)
		tl_message_extended_media_slices_gen.go#L57: func (s MessageExtendedMediaClassArray) Retain(keep func(x MessageExtendedMediaClass) bool) MessageExtendedMediaClassArray {