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

one use

	github.com/gotd/td/tg (current package)
		tl_encrypted_file_slices_gen.go#L57: func (s EncryptedFileClassArray) Retain(keep func(x EncryptedFileClass) bool) EncryptedFileClassArray {