You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: plugins.go
    path of file: ./repos/goldfish/vendor/github.com/michaelklishin/rabbit-hole
    
    the code of the file until where you have to start completion: package rabbithole

func (c *Client) EnabledProtocols() (xs []string, err error) {
	overview, err := c.Overview()
	if err != nil {
		return []string{}, err
	}

	// we really need to implement Map/Filter/etc. MK.
	xs = make([]string, len(o
    
func (c *Client) EnabledProtocols() (xs []string, err error) {
	overview, err := c.Overview()
	if err != nil {
		return []string{}, err
	}

	// we really need to implement Map/Filter/etc. MK.
	xs = make([]string, len(overview.Listeners))
	for i, lnr := range overview.Listeners {
		xs[i] = lnr.Protocol
	}

	return xs, nil
}