I am working on the angular bootstrapUI accordion, I need to catch the toggle event for each section, for example, in each header of section, I have a arrow, when it is open the arrow-down will show,and other arrows in other sections will show arrow-right.something like this:
<accordion-group  is-open="true"  ng-repeat="destination in mileage.destionations">
            <accordion-heading>
                <span ng-class="{'fa-chevron-down': openEvent, 'fa-chevron-right': !openEvent">Toggle Me</span>
            </accordion-heading>
               <div class='accordion-section'>
                    Main content here
                </div>
        </accordion-group>
As you see,How can I toggle the class fa-chevron-down and fa-chevron-right for each section in the accordion-group?