<i class="pull-right float-xs-right fa"
[ngClass]="{'fa-chevron-down': group.isOpen, 'fa-chevron-right': !group.isOpen}"></i>
</div>
<i class="pull-right float-xs-right fa"
[ngClass]="{'fa-chevron-down': group.isOpen, 'fa-chevron-right': !group.isOpen}"></i>
</div>