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

one use

	github.com/gotd/td/tg (current package)
		tl_encrypted_chat_slices_gen.go#L57: func (s EncryptedChatClassArray) Retain(keep func(x EncryptedChatClass) bool) EncryptedChatClassArray {