src/vs/workbench/contrib/preferences/browser/settingsTree.ts/SettingGroupRenderer/renderElement
class SettingGroupRenderer:	renderElement(element: ITreeNode<SettingsTreeGroupElement, never>, index: number, templateData: IGroupTitleTemplate): void {
		templateData.parent.innerText = '';
		const labelElement = DOM.append(templateData.parent, $('div.settings-group-title-label.settings-row-inner-container'));
		labelElement.classList.add(`settings-group-level-${element.element.level}`);
		labelElement.textContent = element.element.label;

		if (element.element.isFirstGroup) {
			labelElement.classList.add('settings-group-first');
		}
	}