Iterating over a list of lists in a Handlebars template

list_of_lists.hbs

<!--- json input data:
index: [
    [
        {divider: true, text: "A", url: ""},
        {text: "ACCTG 371", url: "", count:23},
        {text: "ACCTG 371", url: "", count:23},
        {text: "ACCTG 371", url: "", count:23},
        {text: "ACCTG 371", url: "", count:23},
        {text: "ACCTG 371", url: "", count:23}
    ],
    [
        {divider: true, text: "F", url: ""},
        {text: "ACCTG 371", url: "", count:23},
        {text: "ACCTG 371", url: "", count:23},
        {text: "ACCTG 371", url: "", count:23},
        {text: "ACCTG 371", url: "", count:23}
    ],
    [
        {divider: true, text: "J", url: ""},
        {text: "ACCTG 371", url: "", count:23},
        {text: "ACCTG 371", url: "", count:23},
        {text: "ACCTG 371", url: "", count:23},
        {text: "ACCTG 371", url: "", count:23}
    ]
]
-->
{{#each index}}
<ul class="plain-list col-3">
{{#each this}}
    {{#if divider}}
        <li><a class="header">{{text}}</a></li>
    {{else}}
        <li><a href="{{url}}">{{text}}<span class="badge">{{count}}</span></a></li>
    {{/if}}
{{/each}}
</ul>
{{/each}}