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

one use

	github.com/gotd/td/tg (current package)
		tl_encrypted_message_slices_gen.go#L57: func (s EncryptedMessageClassArray) Retain(keep func(x EncryptedMessageClass) bool) EncryptedMessageClassArray {