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

one use

	github.com/gotd/td/tg (current package)
		tl_document_attribute_slices_gen.go#L627: func (s DocumentAttributeCustomEmojiArray) Retain(keep func(x DocumentAttributeCustomEmoji) bool) DocumentAttributeCustomEmojiArray {