log.Errorf("failed to close %s: %s", filename, err)
		}
	}()
	data, err := io.ReadAll(file)
	if err != nil {
		return nil, err
	}
	return data, nil
}

func StableXdsStatusCommand(ctx cli.Context) *cobra.Command {
	cmd := XdsStatusCommand(ctx)
	unstableFlags := []string{"xds-via-agents", "xds-via-agents-limit"}
	cmd.PreRunE = func(cmd *cobra.Command, args []string) error {

		proxystatus.XdsStatusCommand(ctx),
	}
	troubleshootingCommands := []*cobra.Command{
		version.NewVersionCommand(ctx),
		proxystatus.StableXdsStatusCommand(ctx),
	}
	var debugCmdAttachmentPoint *cobra.Command
	if viper.GetBool("PREFER-EXPERIMENTAL") {
		legacyCmd := &cobra.Command{
			Use:   "legacy",
			Short: "Legacy command variants",
		}