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Kotlin object registered as extension

Reports Kotlin objects that are registered as plugin extensions.

Extensions lifecycle is managed by the IntelliJ Platform. Using Kotlin objects for extension registration may cause creation of unnecessary extension instances and make plugin unloading impossible.

Extension registration:

<annotator language="myLang" implementationClass="com.example.MyAnnotator"/>

Extension implementation:

// bad: object MyAnnotator : Annotator { ... } // good: class MyAnnotator : Annotator { ... }

Locating this inspection


Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Plugin DevKit | Code

New in 2023.1


By default bundled with

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin

Plugin DevKit, 241.18072

Last modified: 18 June 2024