title: Where has this class been used?
body: <p>For example, I create a UserDataModel class like this:</p>
  
  <pre><code>import 'package:meta/meta.dart';
  
  import '../../../../globals/errors/exceptions.dart';
  import '../../domain/entities/user_data.dart';
  import '../../../../globals/utils/value_checker.dart';
  
  class UserDataModel extends UserData {
    UserDataModel(
        {@required String fullname,
        @required String username,
        @required String token})
        : super(fullname: fullname, username: username, token: token);
  
    factory UserDataModel.fromJson(Map&lt;String, dynamic&gt; json) {
      return UserDataModel(
          fullname: json['fullname'],
          username: json['username'],
          token: json['token']);
    }
  
    factory UserDataModel.fromEntity(UserData userData) {
      return UserDataModel(
          fullname: userData.fullname,
          username: userData.username,
          token: userData.token);
    }
  
    Map&lt;String, dynamic&gt; toJson() {
      Map&lt;String, dynamic&gt; result = new Map&lt;String, dynamic&gt;();
      result = {
        "fullname": fullname,
        "username": username,
        "token": token,
      };
  
      return result;
    }
  }
  </code></pre>
  
  <p>I want to know, which UserDataModel class is initialized in any file? For example, I initialize the UserDataModel class in the repository.dart file or maybe main.dart or something else. How can I know that in VSCode?</p>