missionID, index, includeFinished)</strong>
    </dt>
    <dd>
    Gets the value of an index of a given mission.


    <h3>Parameters:</h3>
    <ul>
        <li><span class="parameter">missionID</span>
         String. The ID of the mission. Can either be a pre-defined mission, or you can use any ad-hoc value if you want to use this to track something that's not a pre-defined mission.
        </li>
        <li><span class="parameter">index</span>
         String. The string that used as the index to search