Occurs whenever an end-user presses an element owned by this AccordionControl and starts dragging this element away from its original location.
NuGet Package: DevExpress.Win.Navigation
The StartElementDragging event's data class is DevExpress.XtraBars.Navigation.StartAccordionElementDraggingEventArgs.
End-users are allowed to drag accordion elements if the AccordionControl.AllowElementDragging property is set to true. See this link to learn more.