function _handleCollapseBegin( event ) {
    var menu = event.target;
    _handleToggle( menu );
    if ( menu === _rootMenu ) {
      _bodyDom.removeEventListener( 'click', _handleBodyClick );
    }
  }
/**
   * Event handler for when FlyoutMenu collapse transition has begun.
   * Use this to perform post-collapseBegin actions.
   * @param {Event} event - A FlyoutMenu event.
   */
Event handler for when FlyoutMenu collapse transition has begun.
Use this to perform post-collapseBegin actions.
@param {Event} event - A FlyoutMenu event.
Event handler for when FlyoutMenu collapse transition has begun . Use this to perform post - collapseBegin actions . @param { Event } event - A FlyoutMenu event .
function _handleCollapseBegin( event ) {
    var menu = event.target;
    _handleToggle( menu );
    if ( menu === _rootMenu ) {
      _bodyDom.removeEventListener( 'click', _handleBodyClick );
    }
  }
function _handleCollapseBegin ( event ) { var menu = event . target ; _handleToggle ( menu ) ; if ( menu === _rootMenu ) { _bodyDom . removeEventListener ( 'click' , _handleBodyClick ) ; } }
Event handler for when FlyoutMenu collapse transition has begun.
Event handler for when FlyoutMenu collapse transition has begun .