private void LocationAdded(object sender, LocationDisplayModelEventArgs e)
 {
     if (e?.Index == null || e?.Model == null)
     {
         return;
     }
     InsertLocationRow(e.Index.Value + LocationRowIdxBase, e.Model);
 }
 private void LocationRemoved(object sender, LocationDisplayModelEventArgs e)
 {
     if (e?.Index == null)
     {
         return;
     }
     View.Rows.RemoveAt(e.Index.Value + LocationRowIdxBase);
 }