src/vs/workbench/services/preferences/common/preferencesModels.ts/DefaultSettings/toContent
class DefaultSettings:	private toContent(settingsGroups: ISettingsGroup[]): string {
		const builder = new SettingsContentBuilder();
		builder.pushLine('[');
		settingsGroups.forEach((settingsGroup, i) => {
			builder.pushGroup(settingsGroup);
			if (i < settingsGroups.length - 1) {
				builder.pushLine(',');
			}
		});
		builder.pushLine(']');
		return builder.getContent();
	}