if c.configDump == nil {
		return fmt.Errorf("config writer has not been primed")
	}
	dump, err := c.retrieveSortedEndpointsSlice(filter)
	if err != nil {
		return err
	}
	marshaller := make(proto.MessageSlice, 0, len(dump))
	for _, eds := range dump {
		marshaller = append(marshaller, eds)
	}
	out, err := json.MarshalIndent(marshaller, "", "    ")
	if err != nil {
		return err
	}
	if outputFormat == "yaml" {

func (c *ConfigWriter) PrintListenerDump(filter ListenerFilter, outputFormat string) error {
	_, listeners, err := c.setupListenerConfigWriter()
	if err != nil {
		return err
	}
	filteredListeners := proto.MessageSlice{}
	for _, listener := range listeners {
		if filter.Verify(listener) {
			filteredListeners = append(filteredListeners, listener)
		}
	}
	out, err := json.MarshalIndent(filteredListeners, "", "    ")