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/twoaxis
    
    the code of the file until where you have to start completion: package main

//go:generate go run main.go

import (
	"fmt"
	"os"

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

func main() {

	/*
	   In this example we add a second series, and assign it to the secondary y axis, giving that series it's own range.

	   We also enable all of the axes by setting the `Show` propery of their respective styles to `true`.
	*/

	graph := chart.Chart{
		XAxis: chart.XAxis{
			TickPosition: chart.TickPositionBetweenTicks,
			ValueFormatter: func(v interface{}) string {
				typed := v.(float64)
				typedDate := chart.TimeFromFloat64(typed)
				return fmt.Sprint
    
func main() {

	/*
	   In this example we add a second series, and assign it to the secondary y axis, giving that series it's own range.

	   We also enable all of the axes by setting the `Show` propery of their respective styles to `true`.
	*/

	graph := chart.Chart{
		XAxis: chart.XAxis{
			TickPosition: chart.TickPositionBetweenTicks,
			ValueFormatter: func(v interface{}) string {
				typed := v.(float64)
				typedDate := chart.TimeFromFloat64(typed)
				return fmt.Sprintf("%d-%d\n%d", typedDate.Month(), typedDate.Day(), typedDate.Year())
			},
		},
		Series: []chart.Series{
			chart.ContinuousSeries{
				XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
				YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
			},
			chart.ContinuousSeries{
				YAxis:   chart.YAxisSecondary,
				XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
				YValues: []float64{50.0, 40.0, 30.0, 20.0, 10.0},
			},
		},
	}

	f, _ := os.Create("output.png")
	defer f.Close()
	graph.Render(chart.PNG, f)
}