src/vs/workbench/contrib/tasks/browser/abstractTaskService.ts/AbstractTaskService/isSettingEntry
class AbstractTaskService:	private isSettingEntry(value: IQuickPickItem): value is IQuickPickItem & { settingType: string } {
		let candidate: IQuickPickItem & { settingType: string } = value as any;
		return candidate && !!candidate.settingType;
	}