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: song.go
    path of file: ./repos/ponzu/examples/deleteable/content
    
    the code of the file until where you have to start completion: package content

import (
	"fmt"
	"log"

	"net/http"

	"github.com/ponzu-cms/p
    
func (s *Song) MarshalEditor() ([]byte, error) {
	view, err := editor.Form(s,
		// Take note that the first argument to these Input-like functions
		// is the string version of each Song field, and must follow
		// this pattern for auto-decoding and auto-encoding reasons:
		editor.Field{
			View: editor.Input("Title", s, map[string]string{
				"label":       "Title",
				"type":        "text",
				"placeholder": "Enter the Title here",
			}),
		},
		editor.Field{
			View: editor.Input("Artist", s, map[string]string{
				"label":       "Artist",
				"type":        "text",
				"placeholder": "Enter the Artist here",
			}),
		},
		editor.Field{
			View: editor.Input("Rating", s, map[string]string{
				"label":       "Rating",
				"type":        "text",
				"placeholder": "Enter the Rating here",
			}),
		},
		editor.Field{
			View: editor.Richtext("Opinion", s, map[string]string{
				"label":       "Opinion",
				"placeholder": "Enter the Opinion here",
			}),
		},
		editor.Field{
			View: editor.Input("SpotifyURL", s, map[string]string{
				"label":       "SpotifyURL",
				"type":        "text",
				"placeholder": "Enter the SpotifyURL here",
			}),
		},
	)

	if err != nil {
		return nil, fmt.Errorf("Failed to render Song editor view: %s", err.Error())
	}

	return view, nil
}