private void UiGridVistaDetalle_ValidatingEditor(object sender, BaseContainerValidateEditorEventArgs e)
        {
            var view = sender as GridView;

            if (view == null || view.FocusedColumn.FieldName != "UNITARY_PRICE")
            {
                return;
            }
            var registro = (PolizaDetalle)UiGridVistaDetalle.GetRow(view.FocusedRowHandle);

            if (Convert.ToDecimal(e.Value.ToString()) < 0)
            {
                e.Valid     = false;
                e.ErrorText = "Cantidad inválida.";
            }
            else
            {
                registro.CUSTOMS_AMOUNT = registro.QTY * Convert.ToDecimal(e.Value.ToString());
            }
        }