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

one use

	github.com/gotd/td/tg (current package)
		tl_forum_topic_slices_gen.go#L215: func (s ForumTopicDeletedArray) Retain(keep func(x ForumTopicDeleted) bool) ForumTopicDeletedArray {