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

one use

	github.com/gotd/td/tg (current package)
		tl_privacy_key_slices_gen.go#L57: func (s PrivacyKeyClassArray) Retain(keep func(x PrivacyKeyClass) bool) PrivacyKeyClassArray {