passing 2 $index values within nested ng-repeat

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So I have an ng-repeat nested within another ng-repeat in order to build a nav menu. On each <li> on the inner ng-repeat loop I set an ng-click which calls the relevant controller for that menu item by passing in the $index to let the app know which one we need. However I need to also pass in the $index from the outer ng-repeat so the app knows which section we are in as well as which tutorial.

<ul ng-repeat="section in sections">
    <li  class="section_title {{section.active}}" >
        {{section.name}}
    </li>
    <ul>
        <li class="tutorial_title {{tutorial.active}}" ng-click="loadFromMenu($index)" ng-repeat="tutorial in section.tutorials">
            {{tutorial.name}}
        </li>
    </ul>
</ul>

here’s a Plunker http://plnkr.co/edit/bJUhI9oGEQIql9tahIJN?p=preview

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