src/vs/workbench/contrib/markers/browser/markersTable.ts/MarkerSeverityColumnRenderer/renderTemplate
class MarkerSeverityColumnRenderer:	renderTemplate(container: HTMLElement): IMarkerIconColumnTemplateData {
		const severityColumn = DOM.append(container, $('.severity'));
		const icon = DOM.append(severityColumn, $(''));

		const actionBarColumn = DOM.append(container, $('.actions'));
		const actionBar = new ActionBar(actionBarColumn, {
			actionViewItemProvider: (action: IAction) => action.id === QuickFixAction.ID ? this.instantiationService.createInstance(QuickFixActionViewItem, <QuickFixAction>action) : undefined,
			animated: false
		});

		return { actionBar, icon };
	}