wpf DataGridComboBoxColumn GroupStyle

DataGridComboBoxColumn

DataGrid

GroupStyle

<DataGrid.GroupStyle>
    <GroupStyle>
      <GroupStyle.HeaderTemplate>
        <DataTemplate>
          <TextBlock FontWeight="Bold" FontSize="15"
                     Text="{Binding Path=Name}"/>
        </DataTemplate>
      </GroupStyle.HeaderTemplate>
    </GroupStyle>
  </DataGrid.GroupStyle>