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: main.go
    path of file: ./repos/go-chart/examples/css_classes
    
    the code of the file until where you have to start completion: package main

import (
	"fmt"
	"log"
	"net/http"

	"github.com/wcharczuk/go-chart/v2"
)

// Note: Additional examples on how to add Stylesheets are in the custom_stylesheets example

func inlineSVGWithClasses(res http.ResponseWriter, req *http.Request) {
	res.Write([]byte(
		"<!DOCTYPE html><html><head>" +
			"<link rel=\"stylesheet\" type=\"text/css\" href=\"/main.css\">" +
			"</head>" +
			"<body>"))

	pie := chart.PieChart{
		// Notes: * Setting ClassName will cause all other inline styles to be dropped!
		//        * The following type classes may be added additiona
    
func inlineSVGWithClasses(res http.ResponseWriter, req *http.Request) {
	res.Write([]byte(
		"<!DOCTYPE html><html><head>" +
			"<link rel=\"stylesheet\" type=\"text/css\" href=\"/main.css\">" +
			"</head>" +
			"<body>"))

	pie := chart.PieChart{
		// Notes: * Setting ClassName will cause all other inline styles to be dropped!
		//        * The following type classes may be added additionally: stroke, fill, text
		Background: chart.Style{ClassName: "background"},
		Canvas: chart.Style{
			ClassName: "canvas",
		},
		Width:  512,
		Height: 512,
		Values: []chart.Value{
			{Value: 5, Label: "Blue", Style: chart.Style{ClassName: "blue"}},
			{Value: 5, Label: "Green", Style: chart.Style{ClassName: "green"}},
			{Value: 4, Label: "Gray", Style: chart.Style{ClassName: "gray"}},
		},
	}

	err := pie.Render(chart.SVG, res)
	if err != nil {
		fmt.Printf("Error rendering pie chart: %v\n", err)
	}
	res.Write([]byte("</body>"))
}