src/vs/workbench/contrib/preferences/browser/preferencesRenderers.ts/SettingsGroupTitleRenderer/hiddenAreas
class SettingsGroupTitleRenderer:	get hiddenAreas(): IRange[] {
		const hiddenAreas: IRange[] = [];
		for (const group of this.hiddenGroups) {
			hiddenAreas.push(group.range);
		}
		return hiddenAreas;
	}