How to use the @igo2/common.EntityTableColumnRenderer.ButtonGroup function in @igo2/common

{
        name: 'description',
        title: 'Description',
        renderer: EntityTableColumnRenderer.HTML
      },
      {
        name: 'action',
        title: '',
        valueAccessor: (entity: object) => {
          return [{
            icon: 'home',
            color: 'warn',
            click: (row) => { console.log(row); }
          }] as EntityTableButton[];
        },
        renderer: EntityTableColumnRenderer.ButtonGroup
      }
    ]
  };

  constructor(private languageService: LanguageService) {}

  ngOnInit() {
    this.store.load([
      { id: '2', name: 'Name 2', description: '<b>Description 2</b>' },
      { id: '1', name: 'Name 1', description: '<b>Description 1</b>' },
      { id: '3', name: 'Name 3', description: '<b>Description 3</b>' }
    ]);
  }

  ngOnDestroy() {
    this.store.destroy();