<VisualElement.Resources>
        <Color x:Key="LightGray">#F8F8F8</Color>
        <Color x:Key="Gray">#DFDFDF</Color>


        <DataTemplate x:Key="GroupingPanelItemTemplate">

            <Grid ColumnDefinitions="*, Auto">
                <Label Text="{Binding DisplayContent}"
                           Margin="10, 8, 2, 8" />
                <Button Command="{Binding RemoveCommand, Source={RelativeSource AncestorType={Type telerik:DataGridGroupingPanel}}}"
                            CommandParameter="{Binding}"
                            Grid.Column="1"
                            Text="X"
                            WidthRequest="30"
                            HeightRequest="30"/>
            </Grid>
        </DataTemplate>
        <ControlTemplate x:Key="GroupingPanelTemplate">
            <Grid RowDefinitions="Auto, *">
                <Label Text="{x:Static resources:DataGrid.DataGrid_GroupingPanelHeaderText}" TextColor="{AppThemeBinding Light=Red, Dark=Blue}"
                           Margin="11" />
                <CollectionView ItemTemplate="{Binding DataGrid.GroupingPanelItemTemplate, Source={RelativeSource AncestorType={Type telerik:DataGridGroupingPanel}}, TargetNullValue={StaticResource GroupingPanelItemTemplate}}"
                                    ItemsSource="{TemplateBinding DataGrid.GroupDescriptors}"
                                    CanReorderItems="True"
                                    Grid.Row="1">
                    <CollectionView.ItemsLayout>
                        <LinearItemsLayout Orientation="Vertical"
                                               ItemSpacing="2" />
                    </CollectionView.ItemsLayout>
                </CollectionView>
            </Grid>
        </ControlTemplate>
    </VisualElement.Resources>
    <Grid RowDefinitions="Auto,*">
        <telerik:DataGridGroupingPanel DataGrid="{Binding Source={x:Reference dataGrid}}"
                                       ControlTemplate="{StaticResource GroupingPanelTemplate}" />

        <telerik:RadDataGrid AutoGenerateColumns="True" Grid.Row="1"
                             x:Name="dataGrid" ServicePanel="{Null}" UserGroupMode="Enabled"
                         ItemsSource="{Binding Items}"/>
    </Grid>