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

one use

	github.com/gotd/td/tg (current package)
		tl_input_media_slices_gen.go#L921: func (s InputMediaPhotoExternalArray) Retain(keep func(x InputMediaPhotoExternal) bool) InputMediaPhotoExternalArray {