src/vs/workbench/contrib/preferences/browser/settingsTreeModels.ts/SettingsTreeGroupElement/constructor
class SettingsTreeGroupElement:	constructor(_id: string, count: number | undefined, label: string, level: number, isFirstGroup: boolean) {
		super(_id);

		this.count = count;
		this.label = label;
		this.level = level;
		this.isFirstGroup = isFirstGroup;
	}