src/vs/workbench/contrib/preferences/browser/preferencesWidgets.ts/SettingsGroupTitleWidget/collapse
class SettingsGroupTitleWidget:	private collapse(collapse: boolean) {
		if (collapse !== this.isCollapsed()) {
			this.titleContainer.classList.toggle('collapsed', collapse);
			this.updateTwisty(collapse);
			this._onToggled.fire(collapse);
		}
	}