func (c *ConfigWriter) setupListenerConfigWriter() (*tabwriter.Writer, []*listener.Listener, error) {
	listeners, err := c.retrieveSortedListenerSlice()
	if err != nil {
		return nil, nil, err
	}
	w := new(tabwriter.Writer).Init(c.Stdout, 0, 8, 1, ' ', 0)
	return w, listeners, nil
}

func (c *ConfigWriter) retrieveSortedListenerSlice() ([]*listener.Listener, error) {
	if c.configDump == nil {