public override bool CanMoveActivities(HitTestInfo moveLocation,
                                        ReadOnlyCollection <Activity> activitiesToMove)
 {
     return(moveLocation.MapToIndex() != 0);
 }
 public override bool CanInsertActivities(HitTestInfo insertLocation,
                                          ReadOnlyCollection <Activity> activitiesToInsert)
 {
     return(insertLocation.MapToIndex() != 0);
 }