function expandExpandoSection(groupId) {
    var listGroup = getListGroup(groupId);
    var expando = getExpandoButton(groupId);

    listGroup.removeClass('invisible');
    expando.removeClass('glyphicon-plus-sign');
    expando.addClass('glyphicon-minus-sign');
}

function toggleExpandoSection(groupId) {
    var listGroup = getListGroup(groupId);

    if (listGroup.hasClass('invisible')) {
        expandExpandoSection(groupId);
    } else {
        collapseExpandoSection(groupId);
    }
}