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: altair_playground.go
    path of file: ./repos/gqlgen/graphql/playground
    
    the code of the file until where you have to start completion: package playground

import (
	"html/template"
	"net/http"
)

var altairPage = template.Must(template.New("altair").Parse(`<!doctype html>
<html>

<head>
  <meta charset="utf-8">
  <title>{{.title}}</title>
  <base href="https://cdn.jsdelivr.net/npm/altair-static@{{.version}}/build/dist/">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <link rel="icon" type="image/x-icon" href="favicon.ico">
  <link href="styles.css" rel="stylesheet" crossorigin="anonymous" integrity="{{.cssSRI}}"/>
</head>

<body>
  <app-root>
    <style>
      .loading-screen {
        display: none;
      }
    </style>
    <div class="loadin
    
func AltairHandler(title, endpoint string) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		err := altairPage.Execute(w, map[string]interface{}{
			"title":                title,
			"endpoint":             endpoint,
			"endpointIsAbsolute":   endpointHasScheme(endpoint),
			"subscriptionEndpoint": getSubscriptionEndpoint(endpoint),
			"version":              "5.0.5",
			"cssSRI":               "sha256-kZ35e5mdMYN5ALEbnsrA2CLn85Oe4hBodfsih9BqNxs=",
			"mainSRI":              "sha256-nWdVTcGTlBDV1L04UQnqod+AJedzBCnKHv6Ct65liHE=",
			"polyfillsSRI":         "sha256-1aVEg2sROcCQ/RxU3AlcPaRZhZdIWA92q2M+mdd/R4c=",
			"runtimeSRI":           "sha256-cK2XhXqQr0WS1Z5eKNdac0rJxTD6miC3ubd+aEVMQDk=",
		})
		if err != nil {
			panic(err)
		}
	}
}