You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: gen.go
    path of file: ./repos/cockroach/pkg/ccl/cliccl
    
    the code of the file until where you have to start completion: // Copyright 2
    
func init() {
	cli.GenCmd.AddCommand(genEncryptionKeyCmd)

	genEncryptionKeyCmd.PersistentFlags().IntVarP(&aesSizeFlag, "size", "s", 128,
		"AES key size for encryption at rest (one of: 128, 192, 256)")
	genEncryptionKeyCmd.PersistentFlags().BoolVar(&overwriteKeyFlag, "overwrite", false,
		"Overwrite key if it exists")
	genEncryptionKeyCmd.PersistentFlags().IntVar(&keyVersionFlag, "version", 1,
		"Encryption format version (1 or 2)")
}