outputBytes = append(outputBytes, []byte("\n")...)
		if err != nil {
			return err
		}
		if ga.outputFormat == "yaml" {
			if outputBytes, err = yaml.JSONToYAML(outputBytes); err != nil {
				return err
			}
		}
		_, err = out.Write(outputBytes)
		return err
	default:
		return fmt.Errorf("output format %q not supported", ga.outputFormat)
	}
}

		}
	}
	out, err := json.MarshalIndent(filteredListeners, "", "    ")
	if err != nil {
		return fmt.Errorf("failed to marshal listeners: %v", err)
	}
	if outputFormat == "yaml" {
		if out, err = yaml.JSONToYAML(out); err != nil {
			return err
		}
	}
	fmt.Fprintln(c.Stdout, string(out))
	return nil
}

func (c *ConfigWriter) setupListenerConfigWriter() (*tabwriter.Writer, []*listener.Listener, error) {

	out, err := json.MarshalIndent(res, "", "\t")
	if err != nil {
		return fmt.Errorf("error while marshaling to JSON: %v", err)
	}
	if outformat == util.YamlFormat {
		if out, err = yaml.JSONToYAML(out); err != nil {
			return fmt.Errorf("error while marshaling to YAML: %v", err)
		}
	}
	fmt.Fprintln(w, string(out))
	return nil
}