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: rss.go
    path of file: ./repos/learning/golang/source_code/go-in-action-code/chapter2/sample/matchers
    
    the code of the file until where you have to start completion: package matchers

import (
	"encoding/xml"
	"errors"
	"fmt"
	"log"
	"net/http"
	"regexp"

	"github.com/goinaction/code/chapter2/sample/search"
)

type (
	// item defines the fields associated with the item tag
	// in the rss document.
	item struct {
		XMLName     xml.Name `xml:"item"`
		PubDate     string   `xml:"pubDate"`
		Title       string   `xml:"title"`
		Description string   `xml:"description"`
		Link        string   `xml:"link"`
		GUID        string   `xml:"guid"`
		GeoRssPoint string   `xml:"georss:point"`
	}

	//
    
func (m rssMatcher) Search(feed *search.Feed, searchTerm string) ([]*search.Result, error) {
	var results []*search.Result

	log.Printf("Search Feed Type[%s] Site[%s] For URI[%s]\n", feed.Type, feed.Name, feed.URI)

	// Retrieve the data to search.
	document, err := m.retrieve(feed)
	if err != nil {
		return nil, err
	}

	for _, channelItem := range document.Channel.Item {
		// Check the title for the search term.
		matched, err := regexp.MatchString(searchTerm, channelItem.Title)
		if err != nil {
			return nil, err
		}

		// If we found a match save the result.
		if matched {
			results = append(results, &search.Result{
				Field:   "Title",
				Content: channelItem.Title,
			})
		}

		// Check the description for the search term.
		matched, err = regexp.MatchString(searchTerm, channelItem.Description)
		if err != nil {
			return nil, err
		}

		// If we found a match save the result.
		if matched {
			results = append(results, &search.Result{
				Field:   "Description",
				Content: channelItem.Description,
			})
		}
	}

	return results, nil
}