I have got a grid with grouping possibility. The grouping column is defined as follows:

 descriptionColumn = new ColumnConfig<>(elementProps.meetingDescription());
and is set as invisible.

I wanted to set a custom text in the grouping header but somehow only the content of the grouping column is changed when I override the render method:

descriptionColumn.setCell(new AbstractCell<String>() {
                                    public void render(Context context, String value, SafeHtmlBuilder sb) {
                                                ElementDto dto = store.get(context.getIndex());
                                                if (dto != null) {
                                                            String summary = ClientUtils.provideText(dto);
Is there any way to set the custom text in the grouping header?