return completion.ValidNamespaceArgs(cmd, ctx, args, toComplete)
	})

	// Attach the Istio logging options to the command.
	root.LoggingOptions.AttachCobraFlags(rootCmd)
	hiddenFlags := []string{
		"log_as_json", "log_rotate", "log_rotate_max_age", "log_rotate_max_backups",
		"log_rotate_max_size", "log_stacktrace_level", "log_target", "log_caller", "log_output_level",
	}
	for _, opt := range hiddenFlags {