import 'api_client.dart'; import 'package:flutter/foundation.dart'; class BillApi { final ApiClient _client; BillApi(this._client); Future> getBills({String? userId, String? familyId}) { final params = {}; if (userId != null) params['userId'] = userId; if (familyId != null) params['familyId'] = familyId; return _client.get('/bills', params: params); } Future> createBill(Map data) { return _client.post('/bills', data: data); } }