remote_data_source.dart

import 'package:dio/dio.dart';

abstract class IRemoteDataSource {
  Future<SomeModel> getModel(int modelId);
}

class RemoteDataSource implements IRemoteDataSource {
  RemoteDataSource({required Dio client}) : _client = client;

  final Dio _client;

	@override
  Future<SomeModel> getModel(int modelId) async {
    try {
      final response = await _client.get('/models/$modelId/');

      if (response.statusCode != 200) throw ServerException();
      return SomeModel.fromJson(response.data);
    } catch (e) {
      throw ServerException();
    }
  }  
}